Show puzzle solution The commuter has walked for 55 minutes before his wife picks him up. Because they arrive home 10 minutes earlier than usual, this means that his wife has chopped 10 minutes ...

What is the smallest number of weighings necessary to determine which stack is counterfeit? Show puzzle solution The counterfeit stack can be identified by a single weighing of coins. You take one ...

Sorry kids, but the money’s run dry. Two-thirds of the state’s fourth graders aren’t proficient in reading and math, according to the latest scores from the National Assessment of ...

The satisfaction of cracking a particularly challenging puzzle is a reward, fostering a sense of accomplishment and encouraging further exploration of mathematical concepts. A new math challenge is ...

Affordable and endlessly fascinating, this cube-shaped puzzle has captivated generations with its colorful, movable parts and a deceptively simple goal: to restore each face to a uniform color.