India, June 13 -- Brain teasers have the ability to entertain you while challenging your thinking skills at the same time. Optical illusions are one of the most popular brain teasers on the internet. These puzzles test how quickly you can spot the difference between rows of the same word or number. A case in point is this optical illusion going viral now.

The puzzle teases your ability to spot a different number in the picture. If you manage to figure it out in 10 seconds or less, then you can crown yourself as a genius. Now, numbers can be nightmares for anyone who doesn't like maths. Fear not, this optical illusion is all about being quick, not crunching numbers.

The challenge seems simple at first glance. All you have to do is find t...