India, Aug. 31 -- Optical illusions are the latest trend on social media. The latest puzzle to go viral is an easy 'find the number' game, where players have been asked to identify the hidden number 38 in this viral image on the internet. But the real task here is that you only get five seconds to find the hidden number. This means that only those who have magnificent observational skills and sharp vision will be able to crack this one.

Counted among the top trends on the internet, optical illusions are usually cleverly crafted images that go on to play tricks with our brains by using various patterns, shapes, and colors. Such fun challenges are a healthy exercise for the brain and eyes, providing a fun way to put our visual intelligence...