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The Rule Of Nine: Why The Number Nine Is The Most Powerful Number There Is And How To Take Advantage Of It.
The Rule Of Nine Why The Number Nine Is The Most Powerful Number There Is And How To Take Advantage Of It Author:John Harrington This book explores in an easy flowing reading style, a fun, little known principle at the heart of our number system that at first amazes anyone that comes across it and raises profound questions and answers about what makes a number a number. From there, the author takes the reader on a guided tour of how this amazing principle can be used to e... more »nsure that the reader never again makes a simple mistake in a math problem using a simple process that's easier to do than the math we all know. This book is a must read for anyone that wants to improve the accuracy of their math or has wondered why numbers work the way they do.« less