Think you're pretty smart? This IQ test may prove otherwise. The Cognitive Reflection Test was originally published as part of a research paper by MIT professor Shane Frederick 14 years go. It's the world's shortest IQ test. There are only 3 questions. More than 80% fail, according to The Mirror.

Here they are:

#1 A bat & ball cost a total $1.10. The ball costs $1.00 more than the ball. What's the price of the ball?

#2 It takes 5 machines 5 minutes to make 5 widgets. How long will it take 100 machines to make 100 widgets?

#3 A patch of lily pads in a lake doubles in size every day. It takes 48 days to cover the entire lake. How long will it take to cover half the lake?

Wanna see how you did?...

Scroll down...






#1 5 cents

#2 5 minutes

#3 47 days

How did you do?