The number 1888081808881 is interesting on several counts. First, it’s a prime number, evenly divisible only by itself and 1. In base 10, it’s also a palindromic number. It has the same sequence of ...

Pyramid schemes come in many guises, but they have one thing in common – they always fail. That is why I was dismayed by the comments on a recent article on that seemed sympathetic to a doomed cause.

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 ...