India, Aug. 8 -- Optical illusions are going viral these days. One challenge that is grabbing attention online will perfectly test your ability to pay attention to detail. In the optical illusion, the word 'sand' appears in almost every row and column of a grid. Only people with sharp eyes can spot the word 'stand' subtly hidden somewhere in the grid within 10 seconds.

Initially, as you look at the image, it seems the word 'sand' appears in almost every box in the grid. Somewhere in that grid is subtly hidden the word 'stand'. You must find the odd word out in no more than 10 seconds.

If you cannot find the answer, here is a hint. The word is not present in the top half of the optical illusion. The challenge plays on the brain's ability...