| Puzzle Box, Volume 1 Contributor(s): Grabarchuk, Peter (Editor), Grabarchuk, Serhiy (Editor), Winkler, Peter (Foreword by) |
|
 |
ISBN: 0486810046 ISBN-13: 9780486810041 Publisher: Dover Publications OUR PRICE: $15.26 Product Type: Paperback Published: November 2016 |
| Additional Information |
| BISAC Categories: - Games & Activities | Puzzles - Games & Activities | Logic & Brain Teasers |
| Dewey: 793.73 |
| LCCN: 2016030255 |
| Physical Information: 0.2" H x 8.2" W x 10.9" (0.60 lbs) 96 pages |
| Descriptions, Reviews, Etc. |
| Publisher Description: 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? On my broken calculator with keys ] - x =, the only functional number is 7. How can I get 34 to appear in the readout? A 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? These 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. Seventeen 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. |
