This intriguing book uses card tricks, mathematical riddles and curiosities, number games and puzzles to explain the whys and how of our number system--the basic principles of adding, subtracting, multiplying, and dividing.
I've read this book at least 20 times (it's a quick read). It's a really old book (1958)....so don't expect to learn anything new. This book is really an introduction to some of the more mysterious properties of individual numbers and types of numbers--a kind of introduction-through-examples of basic number theory. It's a great book for young kids (10-13) to learn about the mystery of numbers. It works really well....I stole my copy from the library. Number 9, you friggen ROCK!