You probably haven’t had to do longhand math in years, but you do mental math every day. Or maybe you google math problems ten times a day, because you’ve forgotten how to do any math beyond your ...

The doubling square trick is a simple mathematical shortcut designed for class 6 to 10 students to make multiplication easier. By using the formula (n-1) × (n+1) = n² - 1, students can quickly ...

Everyone gets really wow'd when someone pulls off some exceptional mental math. The best part is, you can totally be that guy at the party with a little practice and preparation. What follows is 10 ...