(And adults, of course!) These math puzzles test your brain and critical-thinking skills and provide some constructive, ...

Two missiles speed directly toward each other, one at 9,000 miles per hour and the other at 21,000 miles per hour. They start ...

An old calculator uses a seven-segment display, in which numerals are represented by different patterns of vertical and horizontal line segments. But the device is faulty and no longer shows any ...

Experience math in a whole new way. We'll play fun and challenging problem-solving games and puzzles from around the world, including Ancient China and Egypt, Europe, Asia, Africa and the Americas. We ...

A game of chess requires its players to think several moves ahead, a skill that computer programs have mastered over the years. Back in 1996, an IBM ...