Here’s a classic brainteaser that I don’t like. What’s the next number in this sequence: 1, 11, 21, 1211, 111221, …? The answer is 312211, because each number describes the digits in the number that ...

For anyone who is looking for the easiest brain games, here are 8 easiest logic/number puzzles in the world. Number and logical games have been a source of brain exercise and entertainment for ...

The students examined the numbers but couldn’t figure it out immediately. The professor smiled and gave them a hint: “Look at the pattern in how the numbers increase. Focus on the differences between ...

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.