A new optical illusion is going viral online, forcing people to put on their thinking caps to solve the puzzle. It shows three straight horizontal lines stacked vertically and asks a basic question: ...

This tricky optical illusion hides the number 15 among dozens of 51s. Only the sharpest eyes can spot it quickly. Optical illusion challenges have always been interesting as they show how easily our ...

Optical illusions are making waves on the internet. Thousands of people have made brain teasers their favorite pastime, as these challenges allow observers to improve their concentration and ...

Optical illusion challenge: Only a handful of players have been successful in solving this viral puzzle online. Check it out here. Find '6' among the multiple rows of '8' in this viral optical ...