This was an entertaining book on how to mentally calculate numbers. Geek alert!

Jim ( )

Contains techniques for lightning fast mental calculation and other things for elementary mathematics and random tricks. For instance, it includes the phonetic memory system for recalling numbers and a way to calculate dates in your head. The techniques listed in the book are a bit counter intuitive, but they work pretty well. The book also contains problems for you to do on your own in order for you to go and improve your abilities at this particular skill.

Also contained within are biographies of other historical lightning calculators and random bits of trivia which makes this book pretty interesting. ( )

I jealous of those who can do mental arithmetic, this book will help me get a leg up. ( )

I kind of don't want anyone else to read this. ( )

Mathemagics: How to Look Like a Genius Without Really Trying by Arthur Benjamin (1998)