{"product_id":"puzzle-box-volume-1","title":"Puzzle Box, Volume 1","description":"\u003cdiv\u003ePuzzle Box, Volume 1\u003c\/div\u003e\u003cdiv\u003e \u003c\/div\u003e\u003cdiv\u003eContributor(s): Grabarchuk, Peter (Editor), Grabarchuk, Serhiy (Editor), Winkler, Peter (Foreword by), Gilbert, Andrea (Author), Cohen, Bram (Author), Grabarchuk, Helen (Author), Knuth, Donald (Author), Pegg Jr, Ed (Author), Candy, Richard (Author), Friedman, Erich (Author), Nelson, Harry (Author), Hazzard, Shelly (Author), Grabarchuk, Tanya (Author)\u003cbr\u003eISBN: 0486810046   EAN: 9780486810041\u003cbr\u003ePublisher: Dover Publications  \u003cbr\u003eUS SRP: $16.95 US \u003cbr\u003eBinding: Paperback: 96 pages\u003cbr\u003ePub Date: November 16, 2016\u003c\/div\u003e\u003cdiv\u003e \u003c\/div\u003e\u003cdiv\u003eAnnotation: Multiplying 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?\u003c\/div\u003e\u003cdiv\u003e\n\u003cbr\u003eOn my broken calculator with keys + - ÷ x =, the only functional number is 7. How can I get 34 to appear in the readout?\u003c\/div\u003e\u003cdiv\u003e\n\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?\u003c\/div\u003e\u003cdiv\u003e\n\u003cbr\u003eThese and almost 300 other mathematical puzzles appear in this original collection, devised by world-renowned mathematicians, puzzle creators, and devoted puzzle lovers.\u003c\/div\u003e\u003cdiv\u003e \u003c\/div\u003e\u003cdiv\u003eA 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.\u003c\/div\u003e\u003cdiv\u003e\n\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.\u003c\/div\u003e\u003cdiv\u003e \u003c\/div\u003e\u003cdiv\u003eAverage difficulty level is about 3 stars, promising puzzle enthusiasts many entrancing hours of solving and enjoyment.\u003c\/div\u003e\u003cdiv\u003e \u003c\/div\u003e\u003cdiv\u003eThis item is Not Returnable\u003c\/div\u003e\u003cdiv\u003e\n\u003cbr\u003eAdditional Information\u003c\/div\u003e\u003cdiv\u003eBISAC Categories:\u003cbr\u003e- Games \u0026amp; Activities | Puzzles\u003cbr\u003e- Games \u0026amp; Activities | Logic \u0026amp; Brain Teasers\u003c\/div\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e  ","brand":"Serhiy Grabarchuk","offers":[{"title":"Default Title","offer_id":42101201633517,"sku":"9780486810041","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0550\/8097\/6621\/products\/serhiy-grabarchuk-games-puzzles-word-games-puzzle-box-volume-1-36065646084333.jpg?v=1643128725","url":"https:\/\/sureshotbooks.com\/products\/puzzle-box-volume-1","provider":"SureShot Books Publishing LLC","version":"1.0","type":"link"}