Roulette wheel add up to 666

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Yes, even you can learn to do seemingly complex equations in your head all you need to learn are a few tricks. This book will teach you to do math in your head faster than you ever thought possible, dramatically improve your memory for numbers, and-maybe for the first time-make mathematics fun. Get ready to amaze your friends-and yourself-with incredible calculations you never thought you could master, as renowned “mathemagician” Arthur Benjamin shares his techniques for lightning-quick calculations and amazing number tricks.

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Secrets of Mental Math will have you thinking like a math genius in no time. These simple math secrets and tricks will forever change how you look at the world of numbers. Secrets of Mental Math: The Mathemagician’s Guide to Lightning Calculation and Amazing Math Tricks

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