India, Aug. 10 -- Brain teasers come in many forms. Some are age-related puzzles designed to test memory and cognitive skills. Others are mathematical riddles that require logic and calculation. There are also word games, pattern recognition challenges, and visual perception tests. Among these, optical illusions have a special place because they trick the brain into seeing something that may not be immediately obvious. Optical illusions work by playing with colours, shapes, patterns, and light, often hiding objects in plain sight.

(Also read: Optical illusion: Can you spot the mistake in this grid of 202s? Only one cell is wrong)

If you enjoy brain teasers, a new challenge is making the rounds online. Shared on Reddit, the picture shows...