Flex your math muscles with this weekend’s brain teaser. Play now.

A version of this puzzle originally appeared in the February 1957 issue of Scientific American. We’d love to hear from you! E ...

IQ tests are a great way to measure an individual's intelligence. In these tests, a problem is presented to the readers, ...

This puzzle also caught the attention of many, with people struggling to find the pattern. It’s this kind of puzzle that gets ...