India, Aug. 25 -- Optical illusions are taking over the internet. Already a favorite pastime for many on social media, these brain teasers are making waves. If you like optical illusions, this viral challenge will test your imagination and observation skills to the limit. All players have to do is locate the number 76 in this grid of 79s.

Although the challenge appears easy initially, it can be difficult for many to solve this brain teaser within 10 seconds. You need the vision of a sniper to find the hidden number.

At first glance, you have a grid of the number 79. It seems like 79 occupies every row and column of the brain teaser. However, somewhere hidden in this grid is a lone 76. All players must do is locate 76 within just 10 seco...