Add Yahoo as a preferred source to see more of our stories on Google. We like to think that we're pretty good at math, especially after years of schooling. But every once in a while, a simple ...

Every few months, the Internet eats itself over some kind of viral riddle or illusion, each more infuriating than the last. And so, like clockwork, this maddening math problem has gone viral, ...

It’s a common experience for many New York City parents. They sit down to help their kids with math homework, only to be totally flummoxed. Part of the reason is math instruction has undergone a ...