91 cool maths tricks to make you gasp!

This is no ordinary maths book. It's an incredible compendium of mind-blowing facts; tricks that will amaze friends and family; and fun, interactive activities. Young readers will love: Using maths to create uncrackable codes ; exploring weird numerical patterns. (Did you know that 11111111 x 11111111 = 123456787654321?) ; discovering the secrets of mathematical mind-reading. Rediscover subjects such as geometry, statistics, and measurement in a...