Puzzle Box, Volume 1 (Dover Brain Games & Puzzles) - Softcover

Gilbert, Andrea; Cohen, Bram; Grabarchuk, Helen; Knuth, Donald; Pegg Jr., Ed; Candy, Richard; Friedman, Erich; Nelson, Harry; Hazzard, Shelly; Grabarchuk, Tanya

Softcover

ISBN 10: 0486810046 ISBN 13: 9780486810041

Publisher: Dover Publications, 2016

Synopsis

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.

About this title

About the Author

Peter and Serhiy Grabarchuk are part of the Grabarchuk Puzzle Family. Over a period of decades they have produced puzzle books, puzzle apps, interactive puzzles, and more.

Edition details

• Publisher: Dover Publications
• Publication date: 2016
• Language: English
• ISBN 10: 0486810046
• ISBN 13: 9780486810041
• Binding: Paperback
• Number of pages: 96
• Editor: Grabarchuk Peter, Grabarchuk Serhiy