A brain teaser challenge is a type of IQ test that mostly involves solving a puzzle, cracking a code, finding a hidden object ...

Psychology Today's online self-tests are intended for informational purposes only and are not diagnostic tools. Psychology Today does not capture or store personally identifiable information, and your ...

If there are nine people in a room and every person shakes hands exactly once with each of the other people, how many handshakes will there be? How can you prove your answer is correct using a model ...

Among high school students and adults, girls and women are much more likely to use traditional, step-by-step algorithms to ...

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Opinions expressed by Entrepreneur contributors are their own. If you find problem-solving to be energizing, you could be the next great entrepreneur. On the other hand, if facing unforeseen problems ...