The usual IQ tests consist of many questions, which ask for our time and concentration to solve. But there’s a special IQ test that consists of only three questions and is the shortest in the world. Don’t be fooled though, only a few people get it right!
The Cognitive Reflection Test (CRT) only has three questions and determines your IQ. It was initially developed in Princeton University by Dr. Shane Frederick. This test is ultimately designed to make you think slower, and more rational as opposed to going with your gut feeling.
Dr. Frederick states that in order to solve all three questions you need to focus on your intuitive response. So, all you need is to answer all three questions right in order to prove that you’re a genius. Keep in mind that speed is important, too. The faster you solve them, the smarter you are!
Are you a genius? Do this test to find out. Also remember that these questions aren’t as simple as they seem. Students from Ivy League Schools have even failed to get all three correct, showing only a 17% perfect score rate.
Question #1: A bat and a ball cost $1.10 in total. The bat costs $1 more than the ball. How much does the ball cost?
Question #2: If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?
Question #3: In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?
Scroll down for the answers…
Answer #1: 5 cents – There’s a very good chance you guessed 10 cents. The answer is actually a little less – a 5 cent ball plus a bat costing $1.05 will set you back $1.10. And, of course, $1.05 is exactly $1 more expensive than 5 cents. (A Princeton study found that people who responded 10 cents were “significantly” less patient than those who got the right answer.)
Answer #2: 5 minutes – Your gut instinct might be to say 100 minutes. Fortunately, it wouldn’t take quite so long. From the question, we can determine it takes exactly 5 minutes for 1 widget machine to make 1 widget. Therefore, it would take 5 minutes to make 100 widgets from 100 widget machines.
Answer #3: 47 days – You might have guessed 24 days. It seems intuitive to half the number of days because you’re halving the size of the lily pad patch. But if the area of the lake covered in lily pads doubles every day, it would only take one day for it to go from being half covered to fully covered. Take one day away from 48 days and you’re left with 47.
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