Test your IQ with this mind-boggling optical illusion puzzle! Can you spot the hidden second eagle in just 5 seconds? Prove ...

Did you know solving picture puzzles can reveal your hidden intelligence traits? Picture puzzles are a great mental workout ...

How sharp are your observation skills? Ready to test your IQ and critical thinking abilities? Brain teasers are the perfect ...

This challenging puzzle is designed for the most punctilious thinkers. With just 3 seconds on the clock, can you spot the ...

The Roblox IQ Test consists of 200 Floors, all of which have a different question or challenge for you to solve. As you ...

Find out how good your general knowledge is with our quiz that will get you ready for your next trip to the pub.

Discover how nutrition impacts mental health and cognitive abilities. Explore the Mediterranean diet, sugar's effects, and processed food risks on your brain.

David Carr survived the test to become the No. 1 pick last year. And, of course, they'll take the Wonderlic. (Click here, and you can take it, too.) The Wonderlic is an IQ test with only 50 ...

But for test prep startup Study IQ, profitability and user acquisition are not incompatible. The bootstrapped company claims to be profitable from day one with the majority of its users joining ...