Get out your timer and number two pencil to see if your arithmetic skills are still sharp.

An apparently easy-looking math problem has left internet users scratching their heads. The elementary-grade problem looks simple enough to solve in seconds, but has tripped up the masses. The basic ...

It’s not often that 5-year-olds can grasp questions at the frontiers of computer science, but it can happen. Suppose, for instance, that a kindergartner named Alice has two apples, but she prefers ...

Understanding the gap between how today's parents learned math and how their children are being taught, and how to work with ...