A box has 900 balls. 90% are red.

Let’s try a puzzle that looks super easy at first.

Sometimes the shortest questions make our brains work the hardest.

Take a quick look at this one.

A box has 900 balls.

90% are red.

How many are not red?

Most people will answer immediately.

And honestly, the first answer is usually the correct one.

But before we rush, let’s play with the idea a little and continue reading …