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Puzzle Box, Volume 1

By Andrea Gilbert, Peter Grabarchuk (Editor), Serhiy Grabarchuk (Editor), Peter Winkler (Foreword by), Bram Cohen, Helen Grabarchuk, Donald Knuth, Ed Pegg, Jr., Richard Candy, Erich Friedman, Harry Nelson, Shelly Hazzard, Tanya Grabarchuk
Paperback
$19.95
By Andrea Gilbert, Peter Grabarchuk (Editor), Serhiy Grabarchuk (Editor), Peter Winkler (Foreword by), Bram Cohen, Helen Grabarchuk, Donald Knuth, Ed Pegg, Jr., Richard Candy, Erich Friedman, Harry Nelson, Shelly Hazzard, Tanya Grabarchuk
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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 o...

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Activity & Game BooksKidsGames & Activities - KidsPuzzles - KidsPuzzles, Brain Teasers & Logic GamesGAMES & ACTIVITIES->Logic & Brain Teasers