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 ...

For over a century, IQ tests have been used to measure intelligence. But can it really be measured? via shutterstock.com Online IQ “quizzes” purport to be able to tell you whether or not “you have ...

Unlike many other geeks, I have never taken an actual IQ test and thus have no idea what my "IQ" is. Does anyone know of a cheap or, preferably, free IQ test that I can take online? I know IQ tests ...

John, 12-years-old, is three times as old as his brother. How old will John be when he is twice as old as his brother? Two families go bowling. While they are bowling, they order a pizza for £12, six ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American When I was a little tyke, my school ...