Take the World's Shortest IQ Test with Only 3 Questions

Taking an IQ test doesn't have to be akin to drilling through the marathon of questions that is the SAT. (Please don't make us go through that again. Please.) In fact, what has been hailed as the world's shortest IQ test in the world is a whole three questions. Yup, you can take it right now and start bragging to your friends within 30 minutes.

Trick Question

The Cognitive Reflection Test (CRT) was developed by psychologist Shane Frederick in 2005. In a paper published in The Journal of Economic Perspectives, Frederick explains that he picked the three questions for the CRT because they were all "found to yield impulsive erroneous responses." That is, the questions make it easy for people to quickly jump to conclusions, instead of closely analyzing the seemingly simple quiz items.

This kind of mental trickery is how so few people can nail each of the three questions. Beginning in January 2003, the CRT was administered to 3,428 respondents in 35 separate studies over a 26-month period. During that experiment, only 17 percent of students from the top universities in the world (like Yale and Harvard) got a perfect score on the CRT questions. Based on the results of this 26-month experiment, Frederick introduced the complete CRT to the world in 2005. This short test was designed to test someone's ability to ignore their gut response and think more rationally. Scroll down to try out the questions, and keep scrolling to check your answers.
Take the World's Shortest IQ Test with Only 3 Questions



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