Book Description
It's true--playing with numbers can raise your I.Q., and help you think more clearly. And, these 100 examples are among the best. Find the shortcut for adding 2, 3, and 4 to form 6 different 3-digit numbers. Or, try this: What is the smallest number that when multiplied by 3 gives an answer consisting of all 4's? Other braintwisters involve flipping coins, burning candles, and taking apart a Rubik's cube in your head. T hey're all fun. "A puzzle book for a large audience....People who enjoy mathematical puzzles, but are stumped by puzzles at the level of Mensa, will find this book much more manageable."--"Science Books & Film."
