At the 2024 International Mathematical Olympiad (IMO), one competitor did so well that it would have been awarded the Silver ...

Some say the reason most manhole covers are round is that a circle cannot fall through a smaller circular hole. Which of these other two-dimensional shapes cannot fall through a hole that is the same ...

This brain teaser is designed to gauge your logical and analytical thinking abilities, but it also tests your ability to think outside the box and approach problems in a creative way ...