When counting squares in a grid, don’t stop at the smallest boxes; the bigger ones are hiding too. The rule is simple: In an n × n grid—where n is the number of squares both horizontally and ...

Brain teasers are fun little puzzles that make you think in different ways. They might look simple at first, but they often ...

A rediscovered formula is changing how we understand the hidden journeys of airborne particles. Researchers at the University of Warwick have created a straightforward new way to predict how ...

The New York Times' latest game, Pips, brings domino fun to your desktop. How to play Pips as well as hints in case you get stuck.

The interstate system isn’t random. Odd roads run north-south, while even run east-west. But there are a few exceptions and ...