We like to think that we're pretty good at math, especially after years of schooling. But every once in a while, a simple third-grade math problem manages to trip us up and make us question our ...

Third grade was a long time ago, and many of us have forgotten even the most basic of principles. Fortunately, they’re pretty ...

This holiday-themed brainteaser looks simple, but it's quietly tripping up adults everywhere. A math teacher walks us through ...