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It turns out, your school teacher was right. You need math on a regular basis. While most people won't typically have need of orthogonal trajectories, here are some of the most vital math shortcuts ...

Discover fun and easy ways to master math with innovative tricks and techniques. From mental math shortcuts to creative exercises, learning numbers has never been this engaging! Perfect for students ...

“Laziness is our saving grace,” writes mathematician Du Sautoy (The Creativity Code) in this accessible look at thousands of years of mathematical shortcuts. Focusing on 10 different shortcuts, Du ...