One of the easiest ways to gauge a person's IQ and focus is to show them an optical illusion picture.
Researchers in the field of neuroscience have studied the brain's role in creating the illusion of reality by analyzing images of optical illusions.
Theoretically, practicing solving optical illusion problems on a regular basis can help one become a better problem solver.
The above-shared image shows an apple emoji grid with both green and red apples.
In the picture, you can see that one apple is distinct from the rest.
The task for the audience is to identify the fruit within seven seconds.
Observation is the key to success in this assignment.