Optical illusion puzzles have been there for centuries and these are fun challenges that are designed to play tricks on our eyes and brains. Optical illusions work on a simple principle where it ...

Optical illusions to find the hidden objects and numbers are effective at revealing your brainpower and visual IQ. How sharp ...

These quizzes seek to test your IQ by asking you various challenging questions about all kinds of subjects. Take each quiz to find out if you're a genius (I bet you are).

IQ tests are simple brain teasers that have become one of the popular puzzle games on the web. These puzzles are one of the best ways to measure cognitive abilities and mental sharpness. IQ tests ...