New Delhi, June 18 -- Optical illusions are always fun to look at, but they are also a cool way to test how sharp you are. Whether it is a hidden number, a colour trick, or a spot-the-difference challenge, our brains love solving visual puzzles. Of course, we have an optical illusion challenge for you. Trust us, it is not as easy as it looks.

It is a grid full of the same cartoon-style face. Every row, every column - it is all the same face, right? Well, almost. Hidden somewhere in this sea of lookalikes is one face that's slightly different from the rest. Your job? It's easy - find that odd face out.

At first glance, nothing really jumps out. But take a closer look. Row by row, scan the eyes, the eyebrows, the mouth, even the hair. Som...