Here’s a simple number game to play on a rainy day, or while sheltering in place. You and I take turns crossing out numbers from the list {1, 2, 3, …, 9}. The winner is the last person to cross out a ...

Iranian game maker Mahdi Bahrami’s Engare allows users to create their own intricate patterns found in Islamic art and architecture. The intricate geometric patterns of Islamic art are not only ...

Some of the most satisfying number puzzles require little mathematical know-how. In fact, cracking the one below calls for thinking that is quite nonmathematical. I don’t know where or when I first ...