There are several different ways to test observation skills withan IQ test. But, solving the brain teaser challenge ...

Spot the hidden number 3 in a 9-second brain teaser optical illusion that tests observation, IQ, and visual perception skills ...

Visual illusions play tricks with the human brain and test your attentiveness. In today’s visual illusion IQ test, the ...

If you think you have sharp observation skills, this optical illusion is the perfect test for you. A seemingly calm autumn scene is currently leaving the internet puzzled — and only 21% of people have ...

Ready to challenge your brain and your eyes at the same time? This optical illusion and IQ-style test is designed to check ...