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 ...

Mathematicians, are you ready? This second-grade math problem is a doozy—and it seems like no one can figure it out. (By the way, if you can solve this math puzzle, you’re probably a genius.) Angie ...

If only there were a time machine to bring us back to third grade when our biggest worries consisted of who to play with on the playground and if the cafeteria was serving pizza for lunch. But as ...