Some say the reason most manhole covers are round is that a circle cannot fall through a smaller circular hole. Which of ...

Stage 5: Justify thinking. A vital habit that many students need to solidify is recontextualizing after they solve ...

A math puzzle is a type of brain teaser that tests the reader's critical thinking and problem-solving skills by challenging ...

Think you’re smart enough to solve these two tricky brain teasers? Test your logic and see if you can beat the challenge!

Marijn Heule turns mathematical statements into something like Sudoku puzzles, then has computers go to work on them. His ...