It's the Shortest IQ Test - Just 3 Questions ... How Will You Do?

Have you seen it online?

The world's shortest IQ test is spreading across the internet. Called the Cognitive Reflection Test, the quiz was originally part of a research paper published in 2005 by MIT professor Shane Frederick. It's only three questions long . . . but only 17% of people get all of them right.

Here are the three questions . . .

1.A bat and ball cost $1.10 total. The bat costs $1 more than the ball. How much does the ball cost?

2.It takes five machines five minutes to make five widgets. How long would it take 100 machines to make 100 widgets?

3.There's a patch of lily pads in a lake. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long will it take to cover half of the lake?

The answers to the questions are below ...

Filling in bubble test (Getty Images)

And the answers . . .

Question 1. The right answer is 5 cents. The common wrong answer is 10 cents.

Question 2. The right answer is 5 minutes. The common wrong answer is 100 minutes.

Question 3. The right answer is 47 days. The common wrong answer is 24 days.

How did you do?

Brian Cleary

Brian Cleary

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