This puzzle originally appeared in Spektrum der Wissenschaft and was reproduced with permission. We’d love to hear from you!

On one level, sudoku is a simple and fun way to pass the time and keep the brain ticking – but dig deeper, and some ...

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

Ready for a real test? Only people with a high IQ above 130 can find the sum of this number in 7 seconds. Are you up for it?

An "almost impossible" brainteaser has left countless social media users stumped. Brainteasers, puzzles, math problems and o ptical illusions are surging in popularity online, which appears to ...

The brainteaser challenges you to find the skeleton in the image above. This spooky-themed puzzle is sure to test your skills ...

There are six entries in this theme set, at 23-, 37-, 54-, 75-, 91- and 110-Across. The clue at 23A sets the scene with a ...

Some of the hardest puzzles in Silent Hill 2 require a deep knowledge of poem structure, pathing, and math, and it all adds to the fun. Puzzle found in Wood Side Apartments Coin Puzzle Solution ...

A new brain teaser shared by X left many puzzled, as it cleverly played on sibling relationships and challenged assumptions.

This week, we tackle some puzzles while holidaying in a cabin, we go back to a game that had been forgotten about, and try to find some grip during a sharp turn on snow. What have you been playing?

From phonics and early math to science and logic puzzles, these toys offer children an engaging way to build essential skills ...