A room has four corners. Each corner has one cat. Each cat sees 3 cats. how many cats are there in the room?

Why this works

This riddle plays with the perspective of the cats in the room. There are indeed four corners, and in each corner sits one cat. Each cat can see the three other cats in the room, but it cannot see itself. Thus, while it might seem like there are more than four based on their observations, the total number of cats remains four. The riddle cleverly invites you to think about visibility and self-reference, leading to a fun "aha!" moment when you realize the simplicity of the solution!