New Delhi, July 4 -- We are back with another optical illusion. In this one, you get an image full of the letter M. Every row is packed with them. But somewhere in this pattern, there is a single N hiding. That is the challenge. Can you find it?

This is a classic optical illusion. It is not about shapes or shadows. It is about spotting one small difference in a group of similar things. The letters M and N are very close in shape. Especially when they are written in the same font, same color and same size. Your brain assumes they are all the same. That is why this puzzle works so well.

Do not worry if it takes you a while. That is normal. Our brains like patterns. Once we notice a pattern, we tend to stop checking for differences. It is ...