{"title":"Puzzles \u0026 Games","description":"\u003cmeta charset=\"utf-8\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003ePuzzle fans of all ages will love Dover's low priced activity books. Have fun with mazes, search-a-words, crosswords, hidden pictures, dot-to-dots, and other brainteasers!\u003c\/p\u003e","products":[{"product_id":"9780486851211","title":"Nature Lovers' Word Search Puzzles","description":"Enjoy the great outdoors from your favorite armchair with these 100 nature-themed word search puzzles. Exercise your mind as you hunt for a myriad of natural wonders, including famous hiking trails, rivers of the world, national parks, state flowers, beautiful beaches, seashells, mountain ranges, and dozens more! Solutions are provided at the back of the book.  word games; brain mind exercises games teasers; search-a-word; search and find; busy activity books; great outdoors; rivers; national parks; flowers; islands; butterflies; gems; herbs; birds; animals; camping; plants; zoos; gardens; succulents; sharks; roses; hiking; seniors; challenge; learning; educational; relax ","brand":"Ilene J. Rattiner","offers":[{"title":"Default Title","offer_id":47131609301313,"sku":"9780486851211","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486851211.jpg?v=1710435031"},{"product_id":"9780486204987","title":"Mathematical Puzzles of Sam Loyd","description":"\u003cdiv\u003eBizarre imagination, originality, trickiness, and whimsy characterize puzzles of Sam Loyd, America's greatest puzzler. Present selection from fabulously rare \u003ci\u003eCyclopedia\u003c\/i\u003e includes the famous 14–15 puzzles, the Horse of a Different Color, and 115 others in various areas of elementary math. 150 period line drawings.\u003c\/div\u003e\u003cbr\u003e\u003cp\u003e\u003cb\u003eBonus Editorial Feature\u003c\/b\u003e\u003c\/p\u003e\u003cdiv\u003e \u003cdiv\u003e \u003cp\u003eMartin Gardner: A Remembrance  \u003c\/p\u003e\n\u003cp\u003eThe worldwide mathematical community was saddened by the death of Martin Gardner on May 22, 2010. Martin was 95 years old when he died, and had written 70 or 80 books during his long lifetime as an author. Martin's first Dover books were published in 1956 and 1957: \u003ci\u003eMathematics, Magic and Mystery,\u003c\/i\u003e one of the first popular books on the intellectual excitement of mathematics to reach a wide audience, and \u003ci\u003eFads and Fallacies in the Name of Science,\u003c\/i\u003e certainly one of the first popular books to cast a devastatingly skeptical eye on the claims of pseudoscience and the many guises in which the modern world has given rise to it. Both of these pioneering books are still in print with Dover today along with more than a dozen other titles of Martin's books. They run the gamut from his elementary \u003ci\u003eCodes, Ciphers and Secret Writing,\u003c\/i\u003e which has been enjoyed by generations of younger readers since the 1980s, to the more demanding \u003ci\u003eThe New Ambidextrous Universe: Symmetry and Asymmetry from Mirror Reflections to Superstrings,\u003c\/i\u003e which Dover published in its final revised form in 2005.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTo those of us who have been associated with Dover for a long time, however, Martin was more than an author, albeit a remarkably popular and successful one. As a member of the small group of long-time advisors and consultants, which included NYU's Morris Kline in mathematics, Harvard's I. Bernard Cohen in the history of science, and MIT's J. P. Den Hartog in engineering, Martin's advice and editorial suggestions in the formative 1950s helped to define the Dover publishing program and give it the point of view which — despite many changes, new directions, and the consequences of evolution — continues to be operative today.  \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eIn the Author's Own Words:\u003cbr\u003e\"Politicians, real-estate agents, used-car salesmen, and advertising copy-writers are expected to stretch facts in self-serving directions, but scientists who falsify their results are regarded by their peers as committing an inexcusable crime. Yet the sad fact is that the history of science swarms with cases of outright fakery and instances of scientists who unconsciously distorted their work by seeing it through lenses of passionately held beliefs.\"  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\"A surprising proportion of mathematicians are accomplished musicians. Is it because music and mathematics share patterns that are beautiful?\" — Martin Gardner\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Martin Gardner","offers":[{"title":"Default Title","offer_id":47159257399617,"sku":"9780486204987","price":10.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486204987.jpg?v=1710182887"},{"product_id":"9780486204932","title":"The Mathematical Recreations of Lewis Carroll","description":"\u003cdiv\u003e\u003cp\u003eVirtually unobtainable for many years, these two books by Lewis Carroll (C. L. Dodgson) have now been reprinted in their entirety for the pleasure of modern enthusiasts of mathematical puzzles. Written by the 19th-century mathematician who gave us \u003ci\u003eAlice in Wonderland\u003c\/i\u003e and \u003ci\u003eThrough the Looking Glass\u003c\/i\u003e, they contain an unusual combination of wit and mathematical intricacy that will test your mathematical ingenuity and provide hours of stimulating entertainment.\u003cbr\u003e\u003ci\u003ePillow-Problems\u003c\/i\u003e is one of the rarest of all Lewis Carroll's works. It contains 72 mathematical posers ranging from those that can be solved by arithmetic, simple algebra, or plane geometry, to those that require more advanced algebra, trigonometry, algebraical geometry, differential calculus, and transcendental probabilities. Both numerical answers and fully worked out solutions are given, each in a separate section so that you can test your methods of problem-solving even after you have looked up the answer to a problem.\u003cbr\u003eIn \u003ci\u003eA Tangled Tale\u003c\/i\u003e, Carroll embodies some of his most perplexing mathematical puzzles in the ten knots or chapters of a delightful story that has all the charm and wit of his better-known works. The \u003ci\u003eTale\u003c\/i\u003e was originally printed as a monthly magazine serial, and many readers sent in solutions to the problems that were posed in it. In the long Appendix to The \u003ci\u003eTale\u003c\/i\u003e, which contains the answers and solutions to the problems, Carroll uses the answers sent in by readers as the basis for illuminating and entertaining discussions of the many wrong ways in which the problems can be attacked, as well as the right ways.\u003c\/p\u003e\u003c\/div\u003e","brand":"Lewis Carroll","offers":[{"title":"Default Title","offer_id":47159257727297,"sku":"9780486204932","price":16.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486204932.jpg?v=1710180357"},{"product_id":"9780486204925","title":"Symbolic Logic and the Game of Logic","description":"\u003cdiv\u003eIn this unique fusion of logical thought and inimitable whimsy, Over 350 ingenious problems involve classical logic: logic is expressed in terms of symbols; syllogisms and the sorites are diagrammed; logic becomes a game played with 2 diagrams and a set of counters. Two books bound as one.\u003c\/div\u003e conditional probability;word games;logical thinking;logic problems;crossword puzzle;fun frolic;logical deduction;logical structure;mathematical puzzles;vienna circle;white marble;principia mathematica;tangled tale;ayer;crosswords;positivism;logistic;frege;syllogisms;logicians;langer;predicate;symbolic;quantified;axiomatic;axioms;godel;susanne;textbook;aristotelian;rudolf;whitehead;propositions;marbles;algebra;variables;calculus;deductive;geometry;paradoxes;lecturer;pillow;mathematician;philosophers;mathematics;wonderland;diagrams;symbols;russell;solutions;books on mathematicians;books on marbles;books on pillows;books on predicates;books on algebras;books on godel;books on mathematics;books on philosophers;books on solutions;books on russell;books on textbooks;books on propositions;books on crosswords;books on mathematical puzzles;books on langer;books on syllogisms;books on variables;books on rudolf;books on calculus;books on paradoxes;books on axioms;books on white marbles;books on diagrams;books on logical thinkings;books on susanne;books on principia mathematicas;books on frege;books on vienna circles;books on logical structures;books on whitehead;books on symbols;books on wonderlands;books on lecturers;books on word games;books on tangled tales;books on geometries","brand":"Lewis Carroll","offers":[{"title":"Default Title","offer_id":47159259398465,"sku":"9780486204925","price":15.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486204925.jpg?v=1710180354"},{"product_id":"9780486203676","title":"101 Puzzles in Thought and Logic","description":"\u003cdiv\u003e\n\u003cdiv\u003eDo you like puzzles based on logic and reasoning? Try this one:\u003c\/div\u003e\n\u003cdiv\u003eIn a certain bank the position of cashier, manager, and teller are held by Brown, Jones, and Smith, though not necessarily in that order. The teller, who was an only child, earns the least. Smith, who married Brown's sister, earns more than the manager. What position does each man fill?\u003c\/div\u003e\n\u003cdiv\u003eIf you like to entertain yourself and stretch mental muscles on problems like this or more difficult ones, here are 101 entirely new problems for which you need no special knowledge, no mathematical training—simply the ability to reason clearly.\u003c\/div\u003e\n\u003cdiv\u003eFollow these problems through and you will not only increase your ability to think in abstractions, but you will enjoy solving murder problems and robberies, see which fishermen are liars and how a blind man can identify color purely by logic, and enjoy dozens of interesting situations. Puzzles range from easy to relatively difficult, and will please both beginners and experts.\u003c\/div\u003e\n\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e\u003cbr\u003e\u003cp\u003e\u003cb\u003eBonus Editorial Feature\u003c\/b\u003e\u003c\/p\u003e\u003cdiv\u003e \u003cdiv\u003e \u003cp\u003eA Dover Original  \u003c\/p\u003e\n\u003cp\u003eClarence Raymond Wylie, Jr., had a long career as a writer of mathematics and engineering textbooks. His \u003ci\u003eAdvanced Engineering Mathematics\u003c\/i\u003e was the standard text in that field starting in the 1950s and for many decades thereafter. He also wrote widely used textbooks on geometry directed at students preparing to become secondary school teachers, which also serve as very useful reviews for college undergraduates even today. Dover reprinted two of these books in recent years, \u003ci\u003eIntroduction to Projective Geometry\u003c\/i\u003e in 2008 and \u003ci\u003eFoundations of\u003c\/i\u003e \u003ci\u003eGeometry \u003c\/i\u003ein 2009.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe author is important to our program for another reason, as well. In 1957, when Dover was publishing very few original books of any kind, we published Wylie's original manuscript \u003ci\u003e101 Puzzles in Thought and Logic\u003c\/i\u003e. The book is still going strong after 55 years, and the gap between its first appearance in 1957 and \u003ci\u003eIntroduction to Projective Geometry\u003c\/i\u003e in 2008 may be the longest period of time between the publication of two books by the same author in the history of the Dover mathematics program. Wylie's 1957 book launched the Dover category of intriguing logic puzzles, which has seen the appearance of many books by some of the most popular authors in the field including Martin Gardner and, more recently, Raymond Smullyan.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eHere's a quick one from \u003ci\u003e101 Puzzles in Thought and Logic:\u003c\/i\u003e  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eIf it takes twice as long for a passenger train to pass a freight train after it first overtakes it as it takes the two trains to pass when going in opposite directions, how many times faster than the freight train is the passenger train?  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eAnswer: The passenger train is three times as fast as the freight train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"C. R. Wylie, Jr","offers":[{"title":"Default Title","offer_id":47159265296705,"sku":"9780486203676","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486203676.jpg?v=1710206499"},{"product_id":"9780486203638","title":"Win at Checkers","description":"\u003cdiv\u003e\u003cdiv\u003eImprove your game or learn checkers from Millard Hopper, the Unrestricted Checker Champion of the World. Here is a book that will appeal to all your questions — often even before you ask them — and impart many of the championship secrets of a perennially popular recreation.\u003cbr\u003eThe book actually presents, in simple terms, a lifetime of checker experience by one of the greatest players of all time. Individual chapters discuss the basic principles of the game, experts' shots and traps, how the beginner loses, standard openings, locating your best move, the end game, opening \"blitzkrieg\" moves, ways to draw when you are one man less than your opponent, two and three-move restrictions, and the standard rules of checkers. In other words, here is a book that treats checkers as a game of skill, not just as the casual recreation or \"kid's\" game most people feel it is.\u003cbr\u003eYour questions are anticipated in more than 100 detailed questions and answers about both specific situations and general principles. A new Appendix, prepared specifically for this edition by the author, lists match, and tournament scores of recent years.\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eReprint of \u003ci\u003eCheckers, All the Answers on the Art of Successful Checker Playing\u003c\/i\u003e.\u003c\/div\u003e checker board;computer analysis;wooden board;playing checkers;corrugated cardboard;play checkers;intermediate level;cardboard box;reinfeld;grooves;tournaments;durable;doubling;cube;endgame;openings;grandkids;inexpensive;diagram;storage;sturdy;traps;chess;beginner;variations;plastic;champion;tactics;grandson;strategy;positions;wood;books on grooves;books on plastics;books on grandsons;books on reinfeld;books on traps;books on positions;books on grandkids;books on variations;books on openings;books on tournaments;books on diagrams;books on storages;books on cardboard boxes;books on computer analysis;books on beginners;books on tactics;books on intermediate levels;books on checker boards;double;books on strategies;books on endgames;books on woods;books on champions;books on chesses;books on cubes","brand":"Millard Hopper","offers":[{"title":"Default Title","offer_id":47159265493313,"sku":"9780486203638","price":7.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486203638.jpg?v=1710182909"},{"product_id":"9780486202471","title":"Cryptography","description":"\u003cdiv\u003e\"Those who delight in puzzles can find much to ponder here.\" — \u003ci\u003eScience News Letter\u003c\/i\u003e\u003cbr\u003e\"Will be well received by anyone really interested in the subject.\" — \u003ci\u003eScientific Book Club Review\u003c\/i\u003e\u003cbr\u003eReaders interested in secret writing will find this book an excellent elementary explanation of transposition and substitution ciphers, codes, and their solutions. More than 150 problems provide practical application as well as tests of skill and ingenuity.\u003cbr\u003eAfter a brief description of the history of secret writing, the reader is introduced to fundamental principles of ciphers — transposition and substitution — and given an understanding of the various methods of enciphering and deciphering secret messages. The author covers geometrical patterns, route transcription, columnar transposition, and other methods used in transposition; under substitution, he treats mixed cipher systems, single-alphabet and polyalphabetical substitution, mechanical devices, the Vigenère system, etc. A discussion of cryptanalysis leads the reader into 151 problems for which answers are provided at the end. Appendixes offer notes on enciphering Japanese; and explanation of the Baconian Biliteral Cipher; frequency tables for English, French, German, Italian, and Spanish.\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eReprint of the first 1943 edition.\u003c\/div\u003e","brand":"Laurence Dwight Smith","offers":[{"title":"Default Title","offer_id":47159271653697,"sku":"9780486202471","price":9.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486202471.jpg?v=1710180326"},{"product_id":"9780486201528","title":"String Figures and How to Make Them","description":"\u003cdiv\u003eAt some time in your youth, no doubt, you took a loop of string and made a \"cat's-cradle,\" a \"Jacob's ladder,\" or some other type of figure by looping and crossing the string between the fingers. But perhaps you were not aware that this is actually an ancient form of amusement, that it is practiced in all parts of the globe, and is especially popular among primitive tribes. And you probably didn't realize what a great variety of figures can be formed by a single loop of string.\u003cbr\u003eThis book describes, in a simple and easy-to-follow manner, how to make no less than 107 different string figures, just as they are made in their land of origin. It is the only book on the subject in English that gives a thorough and readily understandable treatment, so that a beginner can follow the steps and make the figures without the help of a teacher. The figures offer an excellent means for developing manual dexterity and coordination between brain and hand, and present challenge to personal inventiveness, too, since they are capable of infinite variations. These games are fun for people of all ages: intelligent children can do them easily, and adults find great enjoyment in them. Two people can play the string games together, one using his left and the other his right; and many of the games even require four hands.\u003cbr\u003eThe description of each figure and the process of making it is accompanied by several simply drawn sketches that show each distinct step as it would be viewed by the person making the figure. The illustrator has taken great care to show in each sketch all the loops, all the intertwinings as they should appear at each stage in the process, so that there is no reason for anyone to have undue difficulty in making any of the figures.\u003cbr\u003eBesides those who simply want to use the book as a source of amusement, the book will be of great interest to anthropologists and collectors of string figures, since it greatly increases the knowledge of string games and their distribution around the world.\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eReprint of the original edition.\u003c\/div\u003e jeux de;string games;ce livre;il est;andromeda galaxy;witch's broom;mental agility;remember playing;jacob's ladder;grand children;spiral binding;seven-year-old son;step instructions;eiffel tower;kids love;hardboard;engelhardt;aussi;avec;shoelace;stretchy;vous;cradles;explications;pigtails;klutz;saucer;coordination;dexterity;durable;batteries;anthropological;mastered;instruction;loop;designs;strings;toy;grandson;granddaughter;jacob;fingers;niece;books on pigtails;books on andromeda galaxies;books on step instructions;books on jacob;books on grand children;books on coordinations;books on spiral bindings;books on witch 's brooms;books on stretchy;books on strings;books on fingers;books on instructions;books on cradles;books on batteries;books on grandsons;books on explications;books on ce livres;books on hardboards;remembering playing;books on klutz;books on granddaughters;books on saucers;books on engelhardt;books on string games;books on jacob 's ladders;books on eiffel towers;books on loops;books on shoelaces;books on dexterities;books on designs;books on toys;books on nieces","brand":"Caroline F. Jayne","offers":[{"title":"Default Title","offer_id":47159275520321,"sku":"9780486201528","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486201528.jpg?v=1710208895"},{"product_id":"9780486200972","title":"Cryptanalysis","description":"\u003cdiv\u003e\u003cdiv\u003eGaines's \u003ci\u003eCryptanalysis\u003c\/i\u003e (formerly published as \u003ci\u003eElementary Cryptanalysis\u003c\/i\u003e) is a standard elementary and intermediate text for persons seriously interested in modern science methods for enciphering and deciphering cryptograms. It does not simply repeat older material, but contains much about modern cryptanalysis that is not generally known except to experts. It is especially strong in modern forms of cipher solution.\u003cbr\u003eThis clear and thorough text also provides the reader with 166 specimen codes to solve. This edition for the first time also includes solutions. A special appendix includes final letters, sequence charts, digram, trigram tables, most common words in English and frequencies in English, German, French, Italian, Spanish, and Portuguese.\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eReprint of \u003ci\u003eElementary Cryptanalysis\u003c\/i\u003e.\u003c\/div\u003e data encryption;frequency analysis;imitation game;encryption techniques;key encryption;public-key cryptography;technical topic;programmable computer;secret communication;rsa encryption;applied cryptography;public key;deciphering ancient;complicated mathematics;fermat's enigma;computer encryption;substitution ciphers;quantum cryptography;encryption methods;breaking codes;self study;online videos;information security;navajo indians;quantum computers;computer based;german enigma;egyptian hieroglyphics;enigma code;modern computer;television documentary;math background;simon singh;code breakers;unbreakable code;enigma machine;singh tells;quantum computing;navajo code;charles babbage;code breaking;code talkers;technical explanations;dead languages;encrypted messages;crossword puzzles;secret codes;bletchley park;unsung heroes;alan turing;coded messages;rosetta stone;mary queen;popular science;upper hand;ancient times;quantum physics;historical aspects;ancient greece;ww ii;historical background;historical events;encryptions;cryptoanalysis;code-making;encrypting;cryptanalyst;codemakers;ciphering;cryptanalysis;decryption;cryptographic;fermat;cryptographers;codebreakers;decrypt;encrypt;codebreaking;crypto;decipherment;cryptology;encoding;cyphers;code-breaking;algorithms;deciphered;coding;theorem;cipher;scots;privacy;books on self studies;books on online videos;books on imitation games;books on data encryptions;books on secret communications;books on frequency analysis","brand":"Helen Fouché Gaines","offers":[{"title":"Default Title","offer_id":47159277322561,"sku":"9780486200972","price":15.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486200972_6fb5a3ac-8ff6-4237-9904-06c6227944b2.jpg?v=1710178767"},{"product_id":"9780486214832","title":"Tangrams","description":"\u003cdiv\u003e\u003cdiv\u003eWhat is a tangram? It is more easily seen and understood than defined in words. But to put it briefly, it is a geometric dissection puzzle in which seven standard pieces (five triangles, one square, one rhomboid) are used to make images of various objects. The origin of the name is not known, but the game itself is of Chinese origin, and for centuries it has been one of the most popular diversions in the Orient.\u003cbr\u003eThe tangram is not entirely new to America, since Yankee sea captains brought books of tangram puzzles back from Canton and Shanghai. Edgar Allan Poe was a devotee, while on the other side of the world Napoleon is said to have whiled away his time with them. Around the turn of the twentieth century, the two great modern puzzlers, H. E. Dudeney and Sam Loyd, greatly enlarged the traditional field of tangram situations.\u003cbr\u003eThis collection gathers together nearly 330 tangrams, the best creations of both Chinese and Occidental puzzle devisers. Included are some of the most striking Oriental puzzles, carefully selected from rare nineteenth-century books and some of the most inventive and imaginative inventions of Loyd and Dudeney. Although individual tangrams have always been favorite members of most collections of mathematical amusements, to our knowledge this is the first book devoted entirely to this popular form in many decades.\u003cbr\u003eSome of the tangrams in this collection are relatively easy and can be solved without too much brain-straining. Others are difficult, and many demand quite a bit of mental sweat before they are resolved. All, however, are delightful concoctions in recreational form-perception and will provide many hours of pleasure.\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e puzzle game;preschool homeschool;tangram puzzles;spatial skills;andrew parker;chinese puzzle;robert andrew;visual spatial;spatial reasoning;spatial relationships;tangram pieces;ann tompert;six sets;seven pieces;grandfather tang;ziplock bag;graders love;hands-on activity;hours playing;chinese art;fine motor;brain development;mental exercise;gifted kids;motor skills;students enjoy;geometric shapes;kids enjoy;elderly father;math class;students love;math teacher;tangos;complet;billard;vraiment;cochon;sont;pentomino;tangrams;histoire;cette;loyd;livre;pentominoes;braniac;slocum;durable;tiles;fractions;foxes;soo;geometry;sturdy;grader;plastic;designs;cardboard;solutions;cards;books on geometric shapes;books on tangrams;books on vraiments;books on plastics;books on livres;books on hands-on activities;books on tiles;books on math classes;books on foxes;books on chinese puzzles;books on mental exercises;books on preschool homeschools;books on solutions;books on sonts;books on gifted kids;books on math teachers;books on histoires;books on brain developments;books on puzzle games;books on graders;books on spatial reasonings;books on fractions;books on chinese arts;books on seven pieces;books on cette;books on cochon;books on cardboards;books on six sets;books on loyd;books on cards;books on fine motors;books on robert andrew;books on tangos;books on slocum;books on geometries;books on andrew parker;books on motor skills;books on designs;books on soo;books on billard;books on complets","brand":"Ronald C. Read","offers":[{"title":"Default Title","offer_id":47159302422849,"sku":"9780486214832","price":10.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/files\/9780486214832.jpg?v=1715707042"},{"product_id":"9780486229423","title":"Bridge for Bright Beginners","description":"\u003cdiv\u003e\u003cp\u003eTerence Reese, \"the world's best bridge player and best bridge writer\" (\u003ci\u003eThe New York Times\u003c\/i\u003e), turns his attention in this book to you, the bright beginner. He gives a complete guide to the game with sample bidding and sample game play and coverage of everything the beginner needs, from point count bidding to finesses, to make bridge the exciting, competitive game it is.\u003cbr\u003eMr. Reese isn't content with presenting rules the beginner will later abandon. Instead he builds up the game in simple steps with chapters on opening bids of one, responses, defensive overcalls, opening bids of more than one, play and defense in no trump, play and defense in suit, scoring, and so on, until the game is taught as you can expect to play it against strong competition. In the course of the book you will learn the common terms used in bridge, the fundamentals of offensive and defensive bidding and play, the reasons why bridge strategies work, and how to use such popular conventions as the Blackwood and the Stayman. Altogether you will have had experience evaluating 130 normal bidding hands and playing through 18 sample games. An index and summary of bidding at the end also make the book useful as an instant reference for later use.\u003cbr\u003eBoth the bright beginner and the player who has had some experience will want to use this book to learn the fundamentals of bridge and increase his ability to establish best possible bid and play. For a further competitive advantage and even more bridge fun, you will also want to read Reese's other bridge books, \u003ci\u003eBidding a Bridge Hand \u003c\/i\u003eand\u003ci\u003e Play Bridge with Reese.\u003c\/i\u003e\u003c\/p\u003e\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eReprint of the original 1964 edition.\u003c\/div\u003e american bridge;bridge clubs;advanced player;reference card;bridge playing;modern bridge;learn bridge;current rules;bidding system;bridge players;card holder;duplicate bridge;serious bridge;played bridge;contract bridge;common conventions;advanced beginners;bridge games;intermediate players;test yourself;complex game;playing bridge;play bridge;standard american;cheat sheet;reference tool;card game;learning tool;handy reference;reference guide;audry;truscott;notrump;bridge-playing;rebids;kantar;intermediates;declarer;laminated;bids;scoring;trump;quizzes;dummies;tabs;portable;pamphlet;compact;purse;audrey;booklet;novice;beginner;dorothy;glance;basics;books on learning tools;learn tool;books on card holders;duplicating bridge;books on modern bridges;books on contract bridges;books on bridge playings;books on quizzes;books on duplicate bridges;books on cheat sheets;books on playing bridges;books on advanced players;cheating sheet;books on american bridges;books on truscott;books on reference guides;books on play bridges;books on bridge players;books on handy references;books on kantar;books on card games;books on reference tools;books on standard americans;books on pamphlets;books on intermediate players;books on complex games;books on bidding systems;books on current rules;books on learn bridges;books on advanced beginners;books on dummies;books on common conventions;books on reference cards;books on bridge clubs;books on bridge games;learning bridge;books on intermediates","brand":"Terence Reese","offers":[{"title":"Default Title","offer_id":47159328637249,"sku":"9780486229423","price":8.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486229423.jpg?v=1710181508"},{"product_id":"9780486237985","title":"Mind-Boggling Mazes","description":"\u003cdiv\u003e\u003cdiv\u003e\n\u003cp\u003eMazes that shimmer, advance, recede, jump, pop, and wiggle — here are 40 mazes, all incorporating op-art effects and other visual illusions designed to challenge your search for the solution and to add to the enjoyment of finding it. Created by master maze-master Dave Phillips, all of the mazes are ingeniously designed.\u003cbr\u003eThe exciting variety of mazes include several 3-D mazes, eccentric circles, spirals, wavering squares, a two-page fortress maze, and many others. There are mazes where you start in one area and finish in another and others where you pass through three or more areas only once, without retracing any paths. Directions and solutions are provided in the back.\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e","brand":"Dave Phillips","offers":[{"title":"Default Title","offer_id":47159428546881,"sku":"9780486237985","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486237985_c8177eb1-2cd6-444e-99b7-d7384ec902e7.jpg?v=1710202095"},{"product_id":"9780486247618","title":"Codes, Ciphers and Secret Writing","description":"\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\u003cdiv\u003e\n\u003cdiv\u003e\"A fascinating, challenging book.\" ― \u003ci\u003eA.L.A. Booklist\u003cbr\u003e\u003c\/i\u003eLearn to use the most important codes and methods of secret communication in use since ancient times. Cipher and decipher codes used by spies. Explore the famous codes that changed the fate of nations and political leaders. And enjoy hours of fun experimenting with cryptography ― the science of secret writing. \u003cbr\u003eBeginning with simple letter substitutions and transposition ciphers, world-famous science writer Martin Gardner explains how to break complicated polyalphabetical ciphers and codes worked with grids, squares, triangles, and charts. You'll learn codes that are keyed to typewriters and telephone dials . . . even codes that use playing cards, knots, and swizzle sticks. Experiment with invisible writing ― inks that glow in black light and turn red under heat ― and explore the possibilities of sending messages through outer space to unknown worlds. \u003cbr\u003eUsing this book, you can solve the historically famous Playfair Cipher used by Australia in World War II, the Pigpen Cipher used by Confederate soldiers during the Civil War, Thomas Jefferson's Wheel Cipher, the Beaufort system used by the British Royal Navy, codes devised by authors for heroes in literature ― Sherlock Holmes, Captain Kidd, and the Shadow. And you will enjoy experimenting with bizarre methods of message sending ― the Dot Code, Knot Code, Swizzle Code, and more. \u003cbr\u003eYoung cryptanalysts, cipher fans, and puzzlists of all ages will find hours of intrigue and challenge in \u003ci\u003eCodes, Ciphers and Secret Writing. \u003c\/i\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\"A stimulating must for the intermediate cryptographer.\" ― \u003ci\u003eThe Kirkus Reviews\u003c\/i\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003e\u003cdiv\u003eReprint of the Simon \u0026amp; Schuster, 1972 edition.\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e\u003cp\u003e\u003cb\u003eBonus Editorial Feature\u003c\/b\u003e\u003c\/p\u003e\u003cdiv\u003e \u003cdiv\u003e \u003cp\u003eMartin Gardner: A Remembrance  \u003c\/p\u003e\n\u003cp\u003eThe worldwide mathematical community was saddened by the death of Martin Gardner on May 22, 2010. Martin was 95 years old when he died, and had written 70 or 80 books during his long lifetime as an author. Martin's first Dover books were published in 1956 and 1957: \u003ci\u003eMathematics, Magic and Mystery,\u003c\/i\u003e one of the first popular books on the intellectual excitement of mathematics to reach a wide audience, and \u003ci\u003eFads and Fallacies in the Name of Science,\u003c\/i\u003e certainly one of the first popular books to cast a devastatingly skeptical eye on the claims of pseudoscience and the many guises in which the modern world has given rise to it. Both of these pioneering books are still in print with Dover today along with more than a dozen other titles of Martin's books. They run the gamut from his elementary \u003ci\u003eCodes, Ciphers and Secret Writing,\u003c\/i\u003e which has been enjoyed by generations of younger readers since the 1980s, to the more demanding \u003ci\u003eThe New Ambidextrous Universe: Symmetry and Asymmetry from Mirror Reflections to Superstrings,\u003c\/i\u003e which Dover published in its final revised form in 2005.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTo those of us who have been associated with Dover for a long time, however, Martin was more than an author, albeit a remarkably popular and successful one. As a member of the small group of long-time advisors and consultants, which included NYU's Morris Kline in mathematics, Harvard's I. Bernard Cohen in the history of science, and MIT's J. P. Den Hartog in engineering, Martin's advice and editorial suggestions in the formative 1950s helped to define the Dover publishing program and give it the point of view which — despite many changes, new directions, and the consequences of evolution — continues to be operative today.  \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eIn the Author's Own Words:\u003cbr\u003e\"Politicians, real-estate agents, used-car salesmen, and advertising copy-writers are expected to stretch facts in self-serving directions, but scientists who falsify their results are regarded by their peers as committing an inexcusable crime. Yet the sad fact is that the history of science swarms with cases of outright fakery and instances of scientists who unconsciously distorted their work by seeing it through lenses of passionately held beliefs.\"  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\"A surprising proportion of mathematicians are accomplished musicians. Is it because music and mathematics share patterns that are beautiful?\" — Martin Gardner\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e \u003cp\u003e \u003c\/p\u003e\u003cp\u003e data encryption;frequency analysis;imitation game;key encryption;public-key cryptography;programmable computer;secret communication;rsa encryption;public key;deciphering ancient;complicated mathematics;fermat's enigma;computer encryption;substitution ciphers;german code;quantum cryptography;encryption methods;breaking codes;information security;navajo indians;quantum computers;german enigma;brain teasers;egyptian hieroglyphics;enigma code;modern computer;television documentary;simon singh;code breakers;unbreakable code;enigma machine;singh tells;quantum computing;logic puzzles;navajo code;charles babbage;code breaking;code talkers;technical explanations;dead languages;encrypted messages;secret codes;bletchley park;secret messages;unsung heroes;alan turing;coded messages;rosetta stone;mary queen;popular science;upper hand;ancient times;quantum physics;historical aspects;ancient greece;ww ii;human history;historical background;historical events;encryptions;cryptoanalysis;code-making;encrypting;cryptanalyst;codemakers;cryptanalysis;decryption;cryptographic;fermat;cryptographers;codebreakers;codebreaking;crypto;decipherment;cryptology;encoding;cyphers;code-breaking;beale;algorithms;kahn;deciphered;coding;decoding;crossword;theorem;cipher;scots;privacy;introductory;kidd;australia;books on public keys;books on imitation games;books on computer encryptions;books on data encryptions;books on programmable computers;books on secret communications;books on frequency analysis\u003c\/p\u003e","brand":"Martin Gardner","offers":[{"title":"Default Title","offer_id":47159486742849,"sku":"9780486247618","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486247618.jpg?v=1710182119"},{"product_id":"9780486249865","title":"Dazzling Mazes","description":"\u003cdiv\u003eLuckily, famed German designer Ulrich Koch has provided solutions to the 50 outrageous mazes he created for this dazzling volume. Otherwise, even the gifted connoisseur might not escape some of his more challenging labyrinths.\u003cbr\u003eAlthough most of the intricate puzzles can be deciphered by intermediate solvers — and there are even a few amusements easy enough for the novice — some, like the \u003ci\u003eAfrican Queen\u003c\/i\u003e, \u003ci\u003eCyclist's Nightmare\u003c\/i\u003e, and \u003ci\u003eFrankfurt Labyrinth\u003c\/i\u003e, require a special talent you'll acquire only after a few evenings of stimulating practice.\u003cbr\u003eMany of the more challenging designs add a special excitement by incorporating bizarre op art effects, Escher-like illusions, and three-dimensional fabrications. Take your time and start with an easy one or, if you're already a dedicated puzzlist, leap right into the fray with one of the more convoluted configurations. Either way, you'll enjoy hours of sensational, inexpensive fun while you test your skills and sharpen your imagination.\u003cbr\u003eEach maze has a useful caption explaining the objective and your possible routes. Even if you can't solve them immediately, the brilliant originality of these unusual mazes will intrigue and delight you and your friends for hours.\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e maze puzzle;harder ones;grandkids love;grandchildren love;fine motor;skill levels;solvers;mazes;granddaughters;pathways;mosaic;stumped;architectural;booklet;three-dimensional;olds;electronic;puzzles;pencil;grandson;nephew;trips;books on maze puzzles;books on mazes;books on grandsons;books on pathways;books on booklets;books on pencils;books on nephews;books on puzzles;books on skill levels;books on fine motors;books on harder ones;books on solvers;books on olds;books on mosaics;books on trips;books on granddaughters","brand":"Ulrich Koch","offers":[{"title":"Default Title","offer_id":47159495098689,"sku":"9780486249865","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486249865_6e1c1673-425a-4c54-a203-cea839c3fa10.jpg?v=1710780939"},{"product_id":"9780486269221","title":"Lewis Carroll's Games and Puzzles","description":"\u003cdiv\u003e\u003cdiv\u003e\u003cp\u003eWidely known as the author of \u003ci\u003eAlice's Adventures in Wonderland\u003c\/i\u003e and other books for children, Lewis Carroll (Charles L. Dodgson) also excelled as a mathematician and inventor of puzzles. Toward the end of his life, Carroll worked on a book of mathematical puzzles and games but died before it was completed. This book is a new compilation of Carroll's surviving puzzles and games, assembled and edited by Edward Wakeling, a Lewis Carroll scholar and writer on mathematics. Included are a substantial number of problems that Carroll had intended for his collection.\u003cbr\u003eAmong the problems — many published here for the first time — are these baffling brain teasers: Cakes in a Row; Alice's Multiplication Tables; Looking-Glass Time; Four Brothers and a Monkey; Hidden Names; Handicaps; Diverse Doublets; Mischmasch; Arithmetical Croquet; Square Numbers; A Sticky Problem; Wise Eyes; Painting Cubes; Two Clocks; An Amazing Maze; The Number Forty-Two; and 26 others.\u003cbr\u003eIn addition to Carroll's original mathematical inventions and games, the editor has supplied a few original problems of his own. Some hints and solutions are also provided. Enhanced with some of John Tenniel's famous illustrations, this volume is a delightful double treat for any puzzle enthusiast or lover of the \"Alice\" books.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e","brand":"Lewis Carroll and Edward Wakeling","offers":[{"title":"Default Title","offer_id":47159619813697,"sku":"9780486269221","price":10.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486269221.jpg?v=1710176971"},{"product_id":"9780486270784","title":"The Moscow Puzzles","description":"\u003cdiv\u003e\u003cdiv\u003eThis is, quite simply, the best and most popular puzzle book ever published in the Soviet Union. Since its first appearance in 1956 there have been eight editions as well as translations from the original Russian into Ukrainian, Estonian, Lettish, and Lithuanian. Almost a million copies of the Russian version alone have been sold.\u003cbr\u003ePart of the reason for the book's success is its marvelously varied assortment of brainteasers ranging from simple \"catch\" riddles to difficult problems (none, however, requiring advanced mathematics). Many of the puzzles will be new to Western readers, while some familiar problems have been clothed in new forms. Often the puzzles are presented in the form of charming stories that provide non-Russian readers with valuable insights into contemporary Russian life and customs. In addition, Martin Gardner, former editor of the Mathematical Games Department, \u003ci\u003eScientific American\u003c\/i\u003e, has clarified and simplified the book to make it as easy as possible for an English-reading public to understand and enjoy. He has been careful, moreover, to retain nearly all the freshness, warmth, and humor of the original.\u003cbr\u003eLavishly illustrated with over 400 clear diagrams and amusing sketches, this inexpensive edition of the first English translation will offer weeks or even months of stimulating entertainment. It belongs in the library of every puzzlist or lover of recreational mathematics.\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eReprint of the Charles Scribner's Sons, New York, 1972 edition.\u003c\/div\u003e Brain mind math games; memory; smart; Algebra; nine; Numbers; Dominoes; dice; Geometry; adult puzzle math riddle books; riddles; problems; brain teaser logic mind puzzles; Russian; math; mathematics; Sudoku; brain teasers; tangram; puzzle game; collection; think; crosswords; adults; entertainment; amusement; questions","brand":"Boris A. Kordemsky. Edited by Martin Gardner","offers":[{"title":"Default Title","offer_id":47159637541185,"sku":"9780486270784","price":16.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/files\/9780486270784_eea5b698-ce6b-473b-a7ca-d0edd44897c3.jpg?v=1761151933"},{"product_id":"9780486281001","title":"Card Games Around the World","description":"A leading inventor and collector of games, Sid Sackson is also an expert on game history. For this highly entertaining volume, the self-proclaimed \"game addict\" has selected over 60 popular games from around the world.\u003cbr\u003eA brief but fascinating introductory chapter to the history of card playing is followed by a valuable glossary of terms associated with this popular pastime. Additional chapters supply instructions, detailed illustrations, and an abundance of clear examples for playing such intriguing diversions as Sampen, Kowah, Kabu, Cha Kau Tsz' and Khanhoo from Asia; Skat, Blackjack, Old Maid, Fan Tan, Eights, Klondike, La Belle Loucie, Accordion, and Hearts from Europe; Whist, Blackout, Cribbage, Spoil Five, and Casino from the British Isles; Pif Paf, Samba, Bolivia, and Canasta from Latin America; and Poker, Pinochle, Contract Bridge, Rummy, and Oklahoma Gin from the United States.\u003cbr\u003eMost games can be played by children or adults with a common deck of 52 playing cards (a few will need additional cards from a second deck).\u003cdiv\u003e\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eReprint of \u003ci\u003ePlaying Cards Around the World\u003c\/i\u003e, Prentice-Hall, Inc., Englewood Cliffs, New Jersey, 1981.\u003c\/div\u003e","brand":"Sid Sackson","offers":[{"title":"Default Title","offer_id":47159752884545,"sku":"9780486281001","price":8.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486281001.jpg?v=1710177422"},{"product_id":"9780486281520","title":"My Best Mathematical and Logic Puzzles","description":"\u003cp\u003eOver a period of 25 years as author of the Mathematical Games column for \u003ci\u003eScientific American\u003c\/i\u003e, Martin Gardner devoted a column every six months or so to short math problems or puzzles. He was especially careful to present new and unfamiliar puzzles that had not been included in such classic collections as those by Sam Loyd and Henry Dudeney. Later, these puzzles were published in book collections, incorporating reader feedback on alternate solutions or interesting generalizations.\u003cbr\u003eThe present volume contains a rich selection of 70 of the best of these brain teasers, in some cases including references to new developments related to the puzzle. Now enthusiasts can challenge their solving skills and rattle their egos with such stimulating mind-benders as The Returning Explorer, The Mutilated Chessboard, Scrambled Box Tops, The Fork in the Road, Bronx vs. Brooklyn, Touching Cigarettes, and 64 other problems involving logic and basic math. Solutions are included.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e\u003cbr\u003e\u003cp\u003e\u003cb\u003eBonus Editorial Feature\u003c\/b\u003e\u003c\/p\u003e\u003cdiv\u003e \u003cdiv\u003e \u003cp\u003eMartin Gardner: A Remembrance  \u003c\/p\u003e\n\u003cp\u003eThe worldwide mathematical community was saddened by the death of Martin Gardner on May 22, 2010. Martin was 95 years old when he died, and had written 70 or 80 books during his long lifetime as an author. Martin's first Dover books were published in 1956 and 1957: \u003ci\u003eMathematics, Magic and Mystery,\u003c\/i\u003e one of the first popular books on the intellectual excitement of mathematics to reach a wide audience, and \u003ci\u003eFads and Fallacies in the Name of Science,\u003c\/i\u003e certainly one of the first popular books to cast a devastatingly skeptical eye on the claims of pseudoscience and the many guises in which the modern world has given rise to it. Both of these pioneering books are still in print with Dover today along with more than a dozen other titles of Martin's books. They run the gamut from his elementary \u003ci\u003eCodes, Ciphers and Secret Writing,\u003c\/i\u003e which has been enjoyed by generations of younger readers since the 1980s, to the more demanding \u003ci\u003eThe New Ambidextrous Universe: Symmetry and Asymmetry from Mirror Reflections to Superstrings,\u003c\/i\u003e which Dover published in its final revised form in 2005.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTo those of us who have been associated with Dover for a long time, however, Martin was more than an author, albeit a remarkably popular and successful one. As a member of the small group of long-time advisors and consultants, which included NYU's Morris Kline in mathematics, Harvard's I. Bernard Cohen in the history of science, and MIT's J. P. Den Hartog in engineering, Martin's advice and editorial suggestions in the formative 1950s helped to define the Dover publishing program and give it the point of view which — despite many changes, new directions, and the consequences of evolution — continues to be operative today.  \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eIn the Author's Own Words:\u003cbr\u003e\"Politicians, real-estate agents, used-car salesmen, and advertising copy-writers are expected to stretch facts in self-serving directions, but scientists who falsify their results are regarded by their peers as committing an inexcusable crime. Yet the sad fact is that the history of science swarms with cases of outright fakery and instances of scientists who unconsciously distorted their work by seeing it through lenses of passionately held beliefs.\"  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\"A surprising proportion of mathematicians are accomplished musicians. Is it because music and mathematics share patterns that are beautiful?\" — Martin Gardner\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e Brain mind math games; memory; smart; numbers; adult puzzle math riddle activity books; riddles; problems; brain teaser logic mind puzzles; math; mathematics; Sudoku; brain teasers; tangram; collection; think; crosswords; adults; questions; challenge; critical thinking; mensa; learning; exercise; enigma; educational","brand":"Martin Gardner","offers":[{"title":"Default Title","offer_id":47159757439297,"sku":"9780486281520","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/files\/9780486281520_9d50213d-42c4-4a6d-bda3-61e6cc9329fa.jpg?v=1773852992"},{"product_id":"9780486287881","title":"Maze Fun","description":"\u003cdiv\u003eTest your wits and pathfinding skills in 40 confusing creations full of false leads, blind alleys, and dead ends. You'll have hours of fun threading your way through these fascinating mazes. Solutions included.\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e","brand":"Mike Artell","offers":[{"title":"Default Title","offer_id":47159825072449,"sku":"9780486287881","price":3.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486287881.jpg?v=1710192694"},{"product_id":"9780486291765","title":"Fun with Hand Shadows","description":"\u003cdiv\u003e\u003cp\u003eThis charming book shows you how to have fun with a pastime that has delighted children and adults for generations: making shadow pictures on the wall with your hands and fingers.\u003cbr\u003eSelected from the pages of two clever 19th-century picture books, 28 hand-shadow illustrations demonstrate how to create marvelous images of a goose, deer (with antlers), birds, a bunny, a dog, an elephant, a tortoise, and a host of other familiar creatures. For extra enjoyment, the illustrations are accompanied by lively, often hilarious verses by Frank Jacobs, whose zany humor and wacky parodies have appeared in numerous publications.\u003cbr\u003eWith this book and a bit of practice , you'll soon be delighting friends and relatives with an entertaining performance of shadow art.\u003cbr\u003e\u003c\/p\u003e\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e humor; super corny; wall shadows; shadow puppets; Christmas stocking; birthday gifts; imagination; grandson; nephews; granddaughter; niece; kids; entertain; laughter; hands; finger; goose, deer, bird; bunny; dog; elephant;  tortoise,","brand":"Frank Jacobs and Henry Bursill","offers":[{"title":"Default Title","offer_id":47159873110337,"sku":"9780486291765","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/files\/9780486291765.jpg?v=1752857450"},{"product_id":"9780486293486","title":"Sports Search-a-Word Puzzles","description":"\u003cdiv\u003e\u003cdiv\u003eAttention, young sports fans! Here's a great way to have fun while you learn more about all kinds of sports. In this book you'll find 50 fascinating search-a-word puzzles dealing with baseball, basketball, football, hockey, soccer, gymnastics, karate, tennis, volleyball, swimming and many more—even skydiving and sled-dog racing!\u003cbr\u003eEach puzzle contains a diagram and list of hidden words. Words in the diagram may be found running forward, backward, up, down or diagonally in any direction. Words always run in a straight line and never skip letters; and letters may be used to form more than one word. Your job is to find the hidden words in each diagram and cross them off the word list.\u003cbr\u003e\u003ci\u003eSports Search-A-Word-Puzzles\u003c\/i\u003e will not only help you sharpen your spelling, vocabulary and word recognition skills, you'll increase your knowledge about almost every athletic activity. Best of all, you'll have hours of enjoyment solving these puzzles. 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Your job is to circle groups of letters that spell the names and words listed above the grid.\u003cbr\u003eTo make it even more interesting, answers appear vertically, horizontally, and diagonally, and can also be spelled forwards and backwards. These puzzles will not only provide you with hours of fun and entertainment, they'll help you learn all about the fifty states and the District of Columbia. 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With a little patience and practice, anyone can learn to make these and 30 additional figures, including a deer, camel, bunny, bull’s head, Shakespeare, grandpa, an elephant, and more. Soon you’ll be able to invent your own designs.\u003cbr\u003eParents, teachers, and older brothers and sisters can use this book to amuse youngsters or themselves. The distinctly Victorian flavor adds considerable period charm to this collection of shadow figures. 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These are very clearly explained and exercises are provided to help you perfect your skills.\u003cbr\u003eAmong the techniques you'll master are speaking without moving your lips, creating contrasting voices, using gestures, emphasizing certain words and executing a speedy delivery. You'll also learn to develop special, lifelike effects such as sneezing and creating a muffled voice or an echo effect for the \"vent\" figure. The book also features a number of dialogues to practice until you've achieved a professional delivery.\u003cbr\u003eIn addition to these important basics, this book guides you in learning how to write, memorize and practice scripts; how to use props, publicize and schedule your show, and much more. Above all, aspiring performers will come to realize that ventriloquism is not a \"natural\" talent, but an acquired one, and that the key to success is \"practice, practice, practice!\"\u003cbr\u003eSo whether you hope to become a celebrated performer, on stage before hundreds or even thousands of people, or simply want to use the ventriloquist's art to entertain family and friends, this indispensable guide will show you how to learn the basics, develop your skills and perfect and polish an appealing routine.\u003c\/div\u003e","brand":"Kolby King","offers":[{"title":"Default Title","offer_id":47159915774273,"sku":"9780486296838","price":7.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486296838_d518b8ae-73cb-44a8-b1dd-b0c947968bfa.jpg?v=1710181160"},{"product_id":"9780486299105","title":"All About the Presidents Search-a-Word Puzzles","description":"\u003cdiv\u003eLearn about Adams' pet alligator, Taft's nickname, and more! 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So grab a pencil and a-Maze yourself!\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e\u003c\/div\u003e harder ones; grandkids; grandchildren; fine motor skills; answer key; skill levels; kids love; age range; directional; mazes; pathway; arrow; coloring; architectural; olds; puzzles; lasted; pencil; grandson; nephew; trips","brand":"Galen Wadzinski","offers":[{"title":"Default Title","offer_id":47160464310593,"sku":"9780486445359","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486445359.jpg?v=1710177894"},{"product_id":"9780486453453","title":"Kakuro for Beginners","description":"\u003cdiv\u003eWelcome to kakuro, the addictive brain teaser! This Japanese puzzle craze, sometimes called \"cross-sums\" or \"kakro,\" is sudoku's bigger (and tougher) brother. As with all good puzzles, the rules are easy to learn but the game is difficult to master. These 101 puzzles are specifically designed to introduce novices to the game.\u003cbr\u003eLike a crossword puzzle, the playing area consists of filled and empty squares. Some of the black squares contain a diagonal slash from top left to bottom right, with numbers in them--the clues. A number in the top right corner relates to an \"across\" clue, and one in the bottom left to a \"down\" clue. The object is to insert digits from 1 to 9 into the white squares that add up to the associated clue; however, no digit can be duplicated in an entry. For example, for a total of 6, you could have 1 and 5 or 2 and 4, but not 3 and 3. Easy, right? Beware! It gets more complicated. In case you're stumped, solutions appear at the end.\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e\u003c\/div\u003e","brand":"John Pazzelli","offers":[{"title":"Default Title","offer_id":47160565432641,"sku":"9780486453453","price":5.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486453453.jpg?v=1710194292"},{"product_id":"9780486454740","title":"Professor Hoffmann's Best Math and Logic Puzzles","description":"\u003cdiv\u003eYou invite a gentleman to stand in the middle of the room. Taking a piece of chalk, you undertake to draw round him a circle which he cannot jump out of. How is it to be done?\u003cbr\u003eThis riddle, \"The Charmed Circle,\" is but one of dozens of antique treats from a classic collection of brainteasers. Professor Hoffmann published his great treasury of old and new puzzles in 1893. Since then, puzzle aficionados have reveled in the Victorian charm of the professor's challenges. This compilation features some of the most pleasantly perplexing highlights from the original edition — 158 puzzles in all, with complete solutions.\u003cbr\u003eFour different kinds of puzzles include those involving arithmetic, a selection of word and letter puzzles, puzzles with counters, and \"quibble\" or \"catch\" puzzles, which rely upon a double meaning or a clever interpretation of the question — such as \"The Charmed Circle,\" above, in which the triumphant puzzle-solver draws a chalk line around the subject's waist.\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003e\u003cdiv\u003eDover republication of a selection of puzzles from\u003ci\u003e Puzzles Old and New\u003c\/i\u003e, Frederick Warne and Co., London and New York, 1893.\u003c\/div\u003e\u003c\/div\u003e","brand":"Louis Hoffmann","offers":[{"title":"Default Title","offer_id":47160579031361,"sku":"9780486454740","price":7.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486454740_38ddba88-7a66-418b-b70d-9215d3cfe604.jpg?v=1710193169"},{"product_id":"9780486143040","title":"Go and Go-Moku","description":"\u003cdiv\u003e\u003cdiv\u003eBest introduction in English to a great Japanese game. Detailed instructions provide valuable information on basic patterns, strategy, tactics, and analyzed games. Used as text by generations of Americans and Japanese as well. 72 diagrams. \"...clearly written diagrammed primer...\" — \u003ci\u003eNew Yorker\u003c\/i\u003e.\u003c\/div\u003e\u003c\/div\u003e Go; Go-Moku; How to Play Go; Go Strategy; Japanese Games","brand":"Edward Lasker","offers":[{"title":"Default Title","offer_id":47178734829889,"sku":"9780486143040","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/files\/9780486143040_18d1c1cf-591c-45cb-8b07-3e66140ff829.jpg?v=1758659543"},{"product_id":"9780486207094","title":"More Mathematical Puzzles of Sam Loyd","description":"\u003cdiv\u003e\u003cdiv\u003eSam Loyd (1841–1911) was America's greatest originator of puzzles. For more than 50 years, his ingenious posers, appearing in innumerable newspaper and magazine articles, stumped and delighted an American public running into the millions. (Four or five of his mechanical puzzles became national crazes.) After Loyd's death, his son issued a vast collection of these problems in a book entitled \"Cyclopedia of Puzzles\" — probably the most famous and exciting collection of puzzles ever assembled in one volume.\u003cbr\u003eNow Martin Gardner, a well-known author of many science and puzzle books and articles, has selected the choicest mathematical puzzles contained in the long out-of-print \"Cyclopedia,\" editing each one for accuracy and clarity, but in such a way as not to sacrifice the unique style and historical flavor of the originals. This is the second volume of Gardner's selection to appear, and contains 166 of Loyd's most brilliant and original creations, together with the 150 line drawings and diagrams with which they were originally illustrated.\u003cbr\u003eA distinctive feature of this new selection is the analytical table of contents, which groups the puzzles according to the type of mathematical skill necessary to solve them. Whatever your taste in mathematical puzzles, you will be able to locate easily puzzles based on arithmetic and algebra; speed and distance problems; game theory; operations research; clock problems; plane geometry; geometrical dissection; route tracing and topological problems; counter and sliding block problems; sold geometry; and physics and calculus problems.\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e\u003cp\u003e\u003cb\u003eBonus Editorial Feature\u003c\/b\u003e\u003c\/p\u003e\u003cdiv\u003e \u003cdiv\u003e \u003cp\u003eMartin Gardner: A Remembrance  \u003c\/p\u003e\n\u003cp\u003eThe worldwide mathematical community was saddened by the death of Martin Gardner on May 22, 2010. Martin was 95 years old when he died, and had written 70 or 80 books during his long lifetime as an author. Martin's first Dover books were published in 1956 and 1957: \u003ci\u003eMathematics, Magic and Mystery,\u003c\/i\u003e one of the first popular books on the intellectual excitement of mathematics to reach a wide audience, and \u003ci\u003eFads and Fallacies in the Name of Science,\u003c\/i\u003e certainly one of the first popular books to cast a devastatingly skeptical eye on the claims of pseudoscience and the many guises in which the modern world has given rise to it. Both of these pioneering books are still in print with Dover today along with more than a dozen other titles of Martin's books. They run the gamut from his elementary \u003ci\u003eCodes, Ciphers and Secret Writing,\u003c\/i\u003e which has been enjoyed by generations of younger readers since the 1980s, to the more demanding \u003ci\u003eThe New Ambidextrous Universe: Symmetry and Asymmetry from Mirror Reflections to Superstrings,\u003c\/i\u003e which Dover published in its final revised form in 2005.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTo those of us who have been associated with Dover for a long time, however, Martin was more than an author, albeit a remarkably popular and successful one. As a member of the small group of long-time advisors and consultants, which included NYU's Morris Kline in mathematics, Harvard's I. Bernard Cohen in the history of science, and MIT's J. P. Den Hartog in engineering, Martin's advice and editorial suggestions in the formative 1950s helped to define the Dover publishing program and give it the point of view which — despite many changes, new directions, and the consequences of evolution — continues to be operative today.  \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eIn the Author's Own Words:\u003cbr\u003e\"Politicians, real-estate agents, used-car salesmen, and advertising copy-writers are expected to stretch facts in self-serving directions, but scientists who falsify their results are regarded by their peers as committing an inexcusable crime. Yet the sad fact is that the history of science swarms with cases of outright fakery and instances of scientists who unconsciously distorted their work by seeing it through lenses of passionately held beliefs.\"  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\"A surprising proportion of mathematicians are accomplished musicians. Is it because music and mathematics share patterns that are beautiful?\" — Martin Gardner\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e puzzle books; games and activities; math games; mechanical puzzles; logic puzzles; sliding block; brain teasers; algebra; speed and distance problems; game theory; clock problems; plane geometry; geometrical dissection; route tracing problems; topological problems; geometry; physics problems; calculus problems; mathematical puzzles; mathematical puzzles; Martin Gardner; math puzzles and games; logic puzzles; math and logic puzzles","brand":"Martin Gardner","offers":[{"title":"Default Title","offer_id":47179439210817,"sku":"9780486207094","price":9.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486207094_213404ad-97e8-4058-8e78-e5f478adab51.jpg?v=1710194697"},{"product_id":"9780486227412","title":"Duplicate Bridge","description":"\u003cdiv\u003e\u003cdiv\u003eWhile there are many Rubber Bridge players eager to learn Duplicate, there are many unaware tournament players who use Rubber Bridge tactics in Duplicate games without realizing the two frequently require very different strategy. Mr. Sheinwold, expert and columnist, defines the mechanical and strategical differences for both groups of players.\u003cbr\u003eSheinwold outlines the rules, etiquette, and scoring of Duplicate Bridge. Taking nothing for granted, he explains procedures that might seem elementary to most — the seating arrangements, the shuffle, the deal and play of cards, the accumulation of points, the changes of seats for the next round — yet essential to proper play. He emphasizes that in Duplicate your real opponents are the other East-West or North-South teams, as the case may be, who bid and play the exact same hands as you.\u003cbr\u003eAfter laying the groundwork, Sheinwold continues with clear-cut illustrations to describe the philosophy of Duplicate Bridge — how to make the most of your cards. He reviews standard bidding practice, the Point-Count system popularized by Goren, and important conventions, like Blackwood's and Gerber's; then he analyzes many of the major bidding differences between Duplicate and Rubber Bridge that affect your score. Of course there is a great deal of risky play involved, but Sheinwold carefully explains how to calculate your risk, when to sacrifice bid, when to bid in third and fourth position, and when to pre-empt or close-out.\u003cbr\u003eThe novice and eager-to-learn player will find this book an indispensable guide, and the more seasoned tournament player will find this an invaluable source of  tips and pointers on bidding and play. For both, Sheinwold makes the tournament play appealing and challenging. It won't be long before his readers score \"top on the board\" in duplicate competition.\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eReprint of the 1967 edition.\u003c\/div\u003e rubber bridge;tournament;tactics;offensive bidding;aggressive bidding;point count system;blackwood;gerber;risky play;sacrifice bid;preempt;close out;scoring;rules;games;cards;how to;reference;strategy;guide;novice player;beginning player;advanced player;bidding;competition;vintage;history of bridge;contract bridge;defensive overcalls;step wise bidding;takeout doubles;penalty doubles;fishbein;no trump;overtrick;slam;safety plays;bad contract;two bids","brand":"Alfred Sheinwold","offers":[{"title":"Default Title","offer_id":47179440750913,"sku":"9780486227412","price":9.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486227412.jpg?v=1710194673"},{"product_id":"9780486273471","title":"A Gamut of Games","description":"\u003cdiv\u003e\"A genuine milestone in the literature of both games and mathematical recreations.\" — Martin Gardner, \u003ci\u003eScientific American\u003cbr\u003e\u003c\/i\u003eAn authority on game history selects 38 of his all-time favorite amusements, including 22 of his own remarkable creations. Sid Sackson presents solitaire, strategy, and party games that can be played by children or adults with such common items as cards, checkerboards, dice, pencils, and paper.  \u003cbr\u003eDiagrams and an abundance of examples, together with clear explanations of strategy and goals, show how to play such intriguing entertainments as Mate, a game of pure skill and logic; Blue and Gray, an exciting variation of Checkers; Plank, an advanced version of Tic-Tac-Toe; Knight Chase, a form of hide-and-seek on the checkerboard; Last Word, in which players select letters to form words in two, three, or four directions; Crossings, a fast-paced battle in which pieces move forward in a group; and other challenging diversions. The author also presents brief reviews of more than 300 other games.\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eReprint of the Pantheon Books, New York, 1982 edition.\u003c\/div\u003e party games; family fun; game night; games for children; games for adults; cards; checkerboards; dice; skill and logic; checkers; tic tac toe; word games; dice games; card games; all ages; solitaire; strategy; board games; puzzles; family favorite; board games;paper games;games designed;strategy games;game designers;game design;card games;public domain;boardgames;solitaire;shogi;paper-based;draughts;checkerboard;canasta;catalog;agricola;haggle;tic-tac-toe;backgammon;dice;checkers;plank;pencils;gaming;1969;gamut;chess;diagrams;designs;abstract;cards;books on checkerboards;books on tic-tac-toes;books on planks;books on public domains;books on game designs;books on diagrams;books on paper games;books on catalogs;books on solitaires;books on gamuts;books on card games;books on cards;books on canastas;books on draughts;books on pencils;books on game designers;books on board games;books on strategy games;books on gamings;books on checkers;books on chesses;books on dice;books on designs;books on boardgames;books on shogi;books on backgammon","brand":"Sid Sackson","offers":[{"title":"Default Title","offer_id":47179447238977,"sku":"9780486273471","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486273471.jpg?v=1710178520"},{"product_id":"9780486474953","title":"Mental Magic","description":"\u003cdiv\u003eA barber in Chicago says he'd rather cut the hair of ten red-headed men than the hair of one brown-haired man. Can you guess why?\u003cbr\u003eAsk Professor Picanumba, a master of riddles who carries dozens of surefire tricks up his sleeve. He'll show you how to astonish your friends and family by predicting the answers to 88 word and number challenges. These tricks require only simple props — a deck of cards or a couple of pairs of dice, a calculator, and a pencil and paper. With or without an audience, these foolproof feats of mental magic offer hours of amusement. Solutions appear at the end, with 64 illustrations in between.\u003cbr\u003eAuthor Martin Gardner has written more than 70 books on subjects from science and math to poetry and religion. Well known for the mathematical games that appeared in \u003ci\u003eScientific American\u003c\/i\u003e for decades and for his \"Trick of the Month\" column in \u003ci\u003ePhysics Teacher\u003c\/i\u003e magazine, Gardner has had a lifelong passion for magic tricks and puzzles.  \u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eReprint of the Sterling Publishing Company, Inc., New York, 1999 edition.\u003c\/div\u003e\u003cbr\u003e\u003cp\u003e\u003cb\u003eBonus Editorial Feature\u003c\/b\u003e\u003c\/p\u003e\u003cdiv\u003e \u003cdiv\u003e \u003cp\u003eMartin Gardner: A Remembrance  \u003c\/p\u003e\n\u003cp\u003eThe worldwide mathematical community was saddened by the death of Martin Gardner on May 22, 2010. Martin was 95 years old when he died, and had written 70 or 80 books during his long lifetime as an author. Martin's first Dover books were published in 1956 and 1957: \u003ci\u003eMathematics, Magic and Mystery,\u003c\/i\u003e one of the first popular books on the intellectual excitement of mathematics to reach a wide audience, and \u003ci\u003eFads and Fallacies in the Name of Science,\u003c\/i\u003e certainly one of the first popular books to cast a devastatingly skeptical eye on the claims of pseudoscience and the many guises in which the modern world has given rise to it. Both of these pioneering books are still in print with Dover today along with more than a dozen other titles of Martin's books. They run the gamut from his elementary \u003ci\u003eCodes, Ciphers and Secret Writing,\u003c\/i\u003e which has been enjoyed by generations of younger readers since the 1980s, to the more demanding \u003ci\u003eThe New Ambidextrous Universe: Symmetry and Asymmetry from Mirror Reflections to Superstrings,\u003c\/i\u003e which Dover published in its final revised form in 2005.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTo those of us who have been associated with Dover for a long time, however, Martin was more than an author, albeit a remarkably popular and successful one. As a member of the small group of long-time advisors and consultants, which included NYU's Morris Kline in mathematics, Harvard's I. Bernard Cohen in the history of science, and MIT's J. P. Den Hartog in engineering, Martin's advice and editorial suggestions in the formative 1950s helped to define the Dover publishing program and give it the point of view which — despite many changes, new directions, and the consequences of evolution — continues to be operative today.  \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eIn the Author's Own Words:\u003cbr\u003e\"Politicians, real-estate agents, used-car salesmen, and advertising copy-writers are expected to stretch facts in self-serving directions, but scientists who falsify their results are regarded by their peers as committing an inexcusable crime. Yet the sad fact is that the history of science swarms with cases of outright fakery and instances of scientists who unconsciously distorted their work by seeing it through lenses of passionately held beliefs.\"  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\"A surprising proportion of mathematicians are accomplished musicians. Is it because music and mathematics share patterns that are beautiful?\" — Martin Gardner\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e math and reasoning games;recreation books for kids;math games;alphabet games;riddles;word challenges;number challenges;card tricks;dice tricks;mental magic;professor picanumba;illustrated book of kids tricks;mathematical games;magic tricks;puzzles;kids book;math tricks;dollar bill magic;matrix puzzles;geometry tricks;coin tricks;fun and games for kids;childrens activity books;magic;games and activities;juvenile nonfiction","brand":"Martin Gardner","offers":[{"title":"Default Title","offer_id":47179496751425,"sku":"9780486474953","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486474953.jpg?v=1710180212"},{"product_id":"9780486802893","title":"Savage Sudoku","description":"Sudoku enthusiasts, rejoice! Here's a collection that features scores of engrossing puzzles that promise to truly test your skills. Created by Terry Stickels, a nationally syndicated puzzle-maker, the challenges range in difficulty from medium and hard to very hard and extremely difficult. Don't worry if you're truly stumped ― complete solutions appear at the end of the book.\u003cbr\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e games; busy activity puzzle books; brain teasers exercise workout; Japanese; clue; boxes; blocks; challenges; logic; math; mathematics; column; row; grid; square; collection; problem solving; recreational math; numbers; counting; count; empty; value; solutions; magic squares; combinatorial; number place; digits","brand":"Terry Stickels and Anthony Immanuvel","offers":[{"title":"Default Title","offer_id":47179774361921,"sku":"9780486802893","price":8.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/files\/9780486802893.jpg?v=1773771642"},{"product_id":"9780486807829","title":"Contemporary Brainteasers","description":"How many cards do I have to deal before I know for certain that you have a straight?\u003cbr\u003eIf two typists can type two pages in two minutes, how many typists will it take to type 18 pages? \u003cbr\u003eHow many days are in five million seconds? \u003cbr\u003eIf you think these are good questions, this is the book for you! Over two hundred entertaining puzzles involving mathematical and mechanical calculations include challenges to your lateral thinking and logical reasoning. When your brain's tired of being teased, you can consult the complete solutions.\u003cbr\u003e\u003cdiv\u003e  Dover Original.\u003c\/div\u003e puzzles; brainteasers; recretational math; mathematics; puzzling; puzzlist; ; matchstick puzzle; geometry; number puzzle; word puzzle; ","brand":"Terry Stickels","offers":[{"title":"Default Title","offer_id":47179794776385,"sku":"9780486807829","price":8.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486807829.jpg?v=1710192399"},{"product_id":"9780486833866","title":"The Book of Tangrams","description":"\u003cdiv\u003eThe challenge of the tangram, the original \"Chinese puzzle,\" lies in your ability to arrange seven geometrical pieces — a square, a rhomboid, and five triangles — into a variety of different shapes. Collected by Sam Loyd, America's great puzzle expert, these 700 endlessly absorbing tangrams offer hours of mind-expanding amusement.\u003cbr\u003eSam Loyd's\u003ci\u003e The Book of Tangrams\u003c\/i\u003e is also a tribute to this tricky and intriguing puzzle. In a famous and delightful spoof of the tangram's history, Loyd includes running commentary on the popular puzzle's origins in ancient China, its religious significance, and its relation to the Pythagorean theorem. But don't let the amusing dialogue fool you! The puzzles are genuine challenges. If you've ever tried your hand at tangrams before, you're probably already addicted to their limitless possibilities. If you haven't, this classic puzzle potpourri will have you hooked in no time! Solutions are included.\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eReprint of \u003ci\u003eThe Eighth Book of Tan,\u003c\/i\u003e Loyd \u0026amp; Company, 1903.\u003c\/div\u003e","brand":"Sam Loyd","offers":[{"title":"Default Title","offer_id":47179884921153,"sku":"9780486833866","price":9.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486833866.jpg?v=1710191845"},{"product_id":"9780486842417","title":"The Bogotá Puzzles","description":"\u003cdiv\u003eCalculate the number of a neighbor's grandchildren based on their ages, figure out the denominations of a government's postage stamps, swap the positions of two chess pieces in the least number of moves, and solve other intriguing puzzles with this captivating compendium.\u003cbr\u003e Inspired by such illustrious collections as the \u003ci\u003eThe Canterbury Puzzles\u003c\/i\u003e, \u003ci\u003eThe Moscow Puzzles\u003c\/i\u003e, and \u003ci\u003eThe Tokyo Puzzles\u003c\/i\u003e, Colombian mathematician and professor Bernardo Recamán assembled these 80 brainteasers, which he acquired while living and working in Bogotá. Recamán's colleagues, students, friends, and acquaintances contributed to this stimulating potpourri of word problems, sudoku-style challenges, and other math-based diversions. Complete solutions appear at the end.\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e busy activity puzzle books; brain teasers games stimulation health exercise workout; numbers; collection; Colombia; challenges; solutions; test; benefits; memory; teens; adults; kids; mathematics; fun; word search; logic; riddles; math; problem solving; mental health; sharp; mind; recreational math; think; clue ","brand":"Bernardo Recamán","offers":[{"title":"Default Title","offer_id":47179936334145,"sku":"9780486842417","price":11.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/files\/9780486842417.jpg?v=1720112089"},{"product_id":"9780486843315","title":"Test Your IQ","description":"\u003cdiv\u003eAre you good at math? Logical thinking? Spatial perception? Can you recognize similarities and differences between words and detect other nuances of language? Here's your chance to find out whether your skills are as sharp as you think they are.\u003cbr\u003e This fascinating book can help you test your intelligence quotient (IQ) in a fun and simple way. Covering a wide range of skills, these 11 IQ tests feature 60 questions each. Challenges range from inserting the appropriate word or number into a series to solving anagrams, defining synonyms, and choosing the correct figure to finish a sequence. Solutions are included.\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e brain teasers; challenge; number; word; puzzles; testing; solve patterns; genius; psychology; measurement; logic; ","brand":"Dover Publications, Inc. Translated by Vali Tamm","offers":[{"title":"Default Title","offer_id":47179950424385,"sku":"9780486843315","price":11.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486843315.jpg?v=1710208009"},{"product_id":"9780486226149","title":"Mazes and Labyrinths","description":"\u003cdiv\u003e\u003cdiv\u003eEver since Herodotus stood in awe before the Great Labyrinth of Egypt and its 3,000 rooms, men have been fascinated by labyrinthine puzzles, constructions, and mazes. This book explores the subject in full, with a complete illustrated account of labyrinths and mazes of all kinds, from earliest times to the present.\u003cbr\u003eThere are labyrinths that consist entirely of rooms and columns, like the Egyptian Labyrinth itself. There are the labyrinths of ancient history and of myth, such as the celebrated Cretan maze in which Theseus slew the Minotaur. There are labyrinths constructed of caverns, those built to protect tombs, and those designed to guard treasures. Labyrinthine patterns have been used in gardens (such as the famous Hampton Court maze), embossed on coins, employed as emblems of royalty, made to represent allegories, built of stones, embedded into the pavements of early churches, and made into toys. We learn about all of them — all that is known, for mystery seems an inescapable part of the story of the labyrinth.\u003cbr\u003eWith devoted scholarship and a nice appreciation for what he terms “the lure of the labyrinth,” the author takes us through accounts of the ancient mazes, the “meanders” of Greek and Roman times, theories on the meaning of church labyrinths, the “mizmaze,” turf mazes and their origins, the floral labyrinth, the hedge maze, examples in stones and carved on rocks, links between labyrinths and magic, maze etymology, hints on maze design and principles of solution, the labyrinth in literature, the labyrinth in strange places, mirror mazes, and even a verbal labyrinth. All important or exceptional examples are illustrated.\u003cbr\u003eThis is a book for anyone who is intrigued by puzzles or beguiled by mysteries, a book for the historian, the mathematician, the student, the lover of the classic, and all those who enjoy reading the product of a cultivated mind dwelling on a subject that touches much of our cultural and artistic heritage.\u003c\/div\u003e\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eReprint of the London, 1922 edition.\u003c\/div\u003e history; mazes; labyrinths; puzzles; games; recreation; landscaping; architecture; philosophy; mythology; myths; folklore; fables; constructions; meanders; spirituality; meditation; mysticism; minotaur; greek mythology; legend; history of labyrinths, maze development; how to create mazes","brand":"W. H. Matthews","offers":[{"title":"Default Title","offer_id":47180109873473,"sku":"9780486226149","price":15.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486226149_aa925f79-22ea-4346-af29-99c6e6d31ee0.jpg?v=1710781072"},{"product_id":"9780486478937","title":"Dead Men Do Tell Tales","description":"\u003cdiv\u003eDo the \"Barroom Crawl,\" in which a man walks into a bar—and doesn't walk out. Take a shot at \"Billiard Blues\" to discover murder right on cue, and \"Hang On\" to find a telemarketer permanently disconnected. These witty whodunits will challenge your knowledge of trivia with mysteries involving literature, art, music, history, baseball, and other pop-culture subjects.\u003cbr\u003eA murder-filled crossword puzzle without the squares, this collection features hints and solutions at the end, along with suggestions for further reading. The puzzling vignettes can be enjoyed alone or in groups, and as the author notes, \"They're fun. They're educational. \u003ci\u003eThey have dead bodies in them\u003c\/i\u003e.\"\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e witty whodunit;mystery;trivia;solve the mystery;follow the clues;logical thinking;deductive reasoning;brief murder mysteries;literature references;art;music;history;baseball;pop culture;murder puzzles;fun mysteries;mini mysteries;recreational math;you be the detective;solve the problems;story problems;riddles and puzzles;family fun;logic;brain teasers;murder mystery puzzles;mystery solving games;detectives","brand":"Sherban Young","offers":[{"title":"Default Title","offer_id":47180123636033,"sku":"9780486478937","price":8.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/files\/9780486478937.jpg?v=1773772285"},{"product_id":"9780486484532","title":"The Pyrgic Puzzler","description":"Eighty mind-bending problems combine the eccentricity of Lewis Carroll with the genius of Einstein. Loaded with chuckles and challenges, the puzzles promise to test the powers of logic and ingenuity of even the most avid fans of brain teasers. Episodes of deliciously tangled storytelling involve an endearing crew of characters, including mad scientist Cryogenes Rosencrumpett, Professor Didipotamus, Dr. Chronos, Miss Grammatica, and astronomer Seymour Stars. The puzzles feature hints as well as complete solutions, and enchanting surrealistic illustrations provide valuable clues.\u003cbr\u003e\u003cbr\u003e\u003cdiv\u003eReprint of the The Kingswood Press, William Heinemann Ltd., 1987 edition.\u003c\/div\u003e games and puzzles; mathematical puzzles; math games; mind bending problems; brain teasers; logic puzzles; puzzles with hints; riddles; clues; gaming; ingenious math puzzles; humor; fun math; math challenges; puzzles; Mind-bending problems; Brain games; Puzzles; Problem solving; Ingenuity","brand":"Christopher Maslanka. Illustrations by Michael Harrington. Foreword by Iris Murdoch","offers":[{"title":"Default Title","offer_id":47180127076673,"sku":"9780486484532","price":9.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/files\/9780486484532_c3389d7f-055c-4151-aae9-6efb468a3fcd.jpg?v=1720198419"},{"product_id":"9780486810041","title":"Puzzle Box, Volume 1","description":"\u003cdiv\u003e\n\u003ci\u003eMultiplying my age by 6 then subtracting 6 produces the same result as subtracting 7 from my age then multiplying by 7. How old am I?\u003cbr\u003eOn my broken calculator with keys + - ÷ x =, the only functional number is 7. How can I get 34 to appear in the readout?\u003cbr\u003eA country mints four denominations of coins, in whole numbers of cents. It takes four of these coins to make 21¢, or 24¢, or 25¢, or 26¢. What are the denominations of the coins?\u003cbr\u003e\u003c\/i\u003eThese and almost 300 other mathematical puzzles appear in this original collection, devised by world-renowned mathematicians, puzzle creators, and devoted puzzle lovers. A unique puzzle project, it unites the efforts of a dozen authors, including software engineer Andrea Gilbert and Bram Cohen, author of the P2P BitTorrent protocol. \u003cbr\u003eSeventeen different types of challenges include 3-D puzzles, chess puzzles, connections, dissections, foldings, geometrical puzzles, logic problems, matchstick puzzles, mazes, moving pieces, number puzzles, put-togethers, strimko, sudoku, visual puzzles, weightings, and word puzzles. The difficulty level of each puzzle is marked by stars, ranging from 2 to 5. Average difficulty level is about 3 stars, promising puzzle enthusiasts many entrancing hours of solving and enjoyment.\u003c\/div\u003e\u003cbr\u003e\u003cdiv\u003eDover Original.\u003c\/div\u003e puzzles; puzzle; matchstick puzzle; geometric puzzle; logic puzzle; word puzzle; space puzzle","brand":"Edited by Peter Grabarchuk and Serhiy Grabarchuk","offers":[{"title":"Default Title","offer_id":47180141855041,"sku":"9780486810041","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0812\/3262\/5985\/products\/9780486810041.jpg?v=1710176185"}],"url":"https:\/\/store.doverpublications.com\/collections\/puzzles-games\/bisac-games-puzzles.oembed?page=3","provider":"Dover Publications","version":"1.0","type":"link"}