Puzzle Archive @puzzles.archive

Every famous puzzle fooled someone

Your brain has a blind spot.

The Monty Hall problem had math professors writing in to say the answer was wrong. It wasn't. Subscribe to our newsletter and get puzzles like these in your inbox, answers included.

Free newsletter. It may sometimes include ads from sponsors. We never share your email address, and you can unsubscribe in one click from any email.

The Monty Hall problemStay or switch?

More from the archive

The blue-eyed islandersNobody leaves for 99 nights
The checker shadow illusionA and B are the same colour

Puzzles, straight to your inbox.