Figuring: The joy of numbers

By Devi Shakuntala and Shakuntala Devi

Book Overview

A collection of numerical and mathematical curiosities and tricks with numbers, by the world's fastest (according to the "Guinness Book of Records) human calculator. A mathematical prodigy since the... This description may be from another edition of this product.

• Format: Hardcover
• Language: English
• ISBN: 0060110694
• ISBN13: 9780060110697
• Release Date: January 1977
• Publisher: Harper & Row
• Length: 157 Pages
• Weight: 0.79 lbs.

Customer Reviews

Very simple, yet very deep...

Although the whole book is excellent, the multiplication chapter is the crowning achievement. Shakuntala teaches you how to cross multiply any two numbers in a very simple, straightforward way that is easy to learn and easy to do. And if you already know how to do Chisanbop (Fingermath), you will have a very powerful tool to do large multiplication problems without paper or pencil. She also does a ton of good stuff with all the other basic arithmatical operations. An great book that should be part of anyone's math library.