One brain teaser that's currently stumping people involves fixing the equation shown below by making a small adjustment. This ...

Add Yahoo as a preferred source to see more of our stories on Google. Novelist Celeste Ng has shared a head-scratching system of equations that her 9-year-old son apparently made up over dinner: At ...

I’ve been out of school for decades, and I don’t spend my days solving equations (I’m more of a word person). Still, I like to think I have a solid grip on basic math: I can usually gauge whether a ...

Have you ever tried to help a child with their third-grade math homework, only to find yourself stumped? You're not alone. Many adults are surprised to discover that some of the math concepts taught ...