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

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 ...

An intriguing number puzzle is making waves on X, inviting challenge-seekers to identify a missing digit from a handwritten list ranging from 1 to 100. Shared by the ever-creative @elonmuskelry, this ...

The New York Times has another excellent little puzzle game to add to your daily Wordle. This one, however, taps into your math skills rather than your vocabulary. Still, I find the two rather ...

Can there be anything left to say about Benjamin Franklin? With the publication of this book the answer is yes, to a mathematical certainty. This is certainly the book to give your favorite math ...

Math puzzles that challenge you to find the missing number are like brain teasers with a numerical twist. They come in many forms, from simple addition sequences with a hidden pattern to complex grids ...