IMTHIYAS MOHAMMED
ASIN: B07VZDJ51Y
Publisher: unknown
Pages: 41
* I discover and advocate a totally new approach to mental squaring, and this technique uses duplex method to compute the square of a given natural number. * This book will help anyone with a passion for mental mathematics, and those who read this book will eventually be able to find the square a 2-,3-,4-, or even 5-digit number easily in mind thus becoming a human calculator!.* I did several calculations in mind successfully while a clock was ticking, and I found that the speed of calculations was amazing!.