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 ...

Anand Mahindra's tweet has a short video clip, wherein a school teacher describes a clever shortcut to multiply various numbers by nine -- to be more precise, a hack to remember the table of nine.

Add Yahoo as a preferred source to see more of our stories on Google. Math shouldn’t be harder than finding the last matching sock in your laundry. These clever shortcuts convert head-scratching ...

“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 ...