Number Enigmas: Over 125 Challenging Exercises Designed for Maximum Fun and Cognitive Conditioning

Containing over 100 exercises, Number Enigmas challenges even the cleverest number crunchers. For fun or for sport, these puzzles are perfect for car trips or airplane rides or even to find out who is the real puzzle wizard in the family. Puzzlers used to those old-fashioned black-and-white enigmas will be happy to move up to this techno-colorful puzzle book.