Twenty years ago, this puzzle appeared on a test administered to top-tier math students from 16 countries around the world. Only 10% of test takers got it right. In the U.S., only 4% managed to ...

Take the pressure off of problem-solving with engaging thinking games that encourage students to work together to find ...

A simple logic puzzle. Three girls ate three differently sized pieces of cake. Girl A and Girl B make statements about who ate which pieces, but they're contradictory. You're to work out which one is ...

In an age of short attention spans and fast-scrolling feeds, one thing still manages to stop us in our tracks: a good brain teaser. Whether it’s a cryptic riddle or a seemingly simple logic puzzle, ...