Brain teasers are excellent for boosting critical thinking capabilities. These puzzles engage your brain and provide a ...

Test your hawk-eye vision by spotting the hidden raccoon among cats in 13 seconds with this visual illusion challenge.

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

This is a straightforward vocabulary test, so if you've ever taken the SATs, this will feel totally familiar. Take the quiz here. It's highly unlikely you'll ever need to write something without spell ...

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

Do you enjoy quick brain challenges that test your focus and patience? Then this optical illusion is made for you. At first ...

A new scientific paper I produced along with Sarah Cassidy and other colleagues, published in the journal Learning and Individual Differences, shows that significant increases in general intelligence, ...