Whether you just want to satisfy your curiosity or to brag about it later, these are 8 Mensa IQ test questions you need to answer to join Mensa, and you are free to try to answer it correctly. A bit ...

MIT professor Shane Frederick's Cognitive Reflection Test is a three-question brain teaser with only a 17 per cent pass rate ...

Add Yahoo as a preferred source to see more of our stories on Google. These quizzes won't give you an exact IQ number, but they will tell you how smart you are by testing your expertise in various ...

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Add Yahoo as a preferred source to see more of our stories on Google. These quizzes seek to test your IQ by asking you various challenging questions about all kinds of subjects. Take each quiz to find ...

The world's shortest IQ test is just three questions long and can tell if you're smarter than 80 percent of the population. Called the Cognitive Reflection Test (CRT), it has been around since 2005 ...

The 'world's shortest IQ test' has only three questions, but it's far from easy to pass. A study by MIT professor Shane ...