Problems

Blog posts with problems to get your brain going! You get a new problem every fortnight and the solutions are published later.

If you want the problems delivered to your inbox be sure to subscribe to the Problems newsletter.

The next problem is scheduled for Sunday, 6th of February.

You may notice some problems are missing... I'm still migrating articles from my old blog.

A waiter at a restaurant gets a group's order completely wrong. Can you turn the table to get two or more orders right?

A bunch of ants are left inside a very, very, tight tube, and they keep colliding with each other and turning around. How long will it take them to escape?