MATH MIND GAMES by Heinrich Hemme
How many cuts would it take to saw a chessboard into 64 separate pieces? No need to be a mathematician to get hooked on these stimulating brain-twisters: they just take some logic and simple school arithmetic. The pleasurable puzzles unfold in small, interesting and wittily illustrated stories about a group of friends and families going about their daily activities. From calculating the price of lollipops to working out the size of a pond in the park, it's pure number fun!