Brain teaser puzzles test the reader's critical thinking and problem-solving skills by challenging them to solve a problem.

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Only highly intelligent readers can solve this math puzzle in 6 seconds. Test your IQ and problem-solving skills now!

Are you smarter than the average U.S. student?Welcome to the ultimate Academic IQ Challenge, inspired by the Nation’s Report ...

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 ...

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). Time to test your vocabulary ...