A brain teaser is like a fun little challenge for your mind. It’s a puzzle or riddle which is designed to make you think creatively and critically, often in ways you’re not used to. At first look, a ...

A viral optical illusion challenges readers to find the hidden number "7103" amidst a grid of "7105." The speed at which you spot it reveals insights into your visual IQ and cognitive processing. This ...

The intelligence quotient (IQ) is a standardized measure of cognition, or your ability to think, understand, reason, learn, and remember. By design, the average IQ score is 100. Higher IQ scores are ...

A brain teaser is like a fun little challenge for your mind. It’s a puzzle or riddle which is designed to make you think creatively and critically, often in ways you’re not used to. At first glance, a ...