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 ...

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 ...

Flipping through a deck of cards in the library as her friends and classmates slough through books and papers means that, sometimes, people want answers from Carolyn Chen. "I usually have to reassure ...