Here's a deeply satisfying number pattern for your mathematical Monday. Here, Numberphile explains the Kolakoski sequence, which begins as follows: 1, 2, 2, 1, 1, 2 ...

A number sequence has gone viral on the internet this week, reading: 2, 6, 12, 20, 30, ?. At first glance, it looks easy, but once people start solving it, they realize spotting the pattern is not so ...

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 ...