The world’s fastest IQ test has only 3 questions

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Think you are smart? Want to find out quickly? Then just take the world’s shortest IQ test below.

The Cognitive Reflection Test was developed in 2005 by MIT Professor Shane Frederick and has recently taken to social media. Boffin Frederick took the test to over 3,000 participants from various educational backgrounds including many from top US universities (eg Yale and Harvard) and even they struggled to get the 3 correct answers.

Out of over 3,000 people surveyed, a meager 17% managed to get all three correct results on the test (which, according to my rudimentary math), means that 83% of people failed. So, do you think you are smarty pants? Do we find out?

A little advice, this may sound simple but that’s part of the problem as you tend to think that they are a lot easier than they first appear …

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

2. If it takes five machines five minutes to create five widgets, how long would it take 100 machines to create 100 widgets?

3. In a lake, there is a square of water lilies. 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?

So let’s see the first question.

Did you say the bullet costs 10 cents?

Oh ! If you did, you have already failed. If that makes you feel better, so do I. And if that makes you feel even better, now I know the answer and still don’t get it (sometimes I wonder how I even manage to tie my shoelaces).

What about the other questions? (which I understood correctly – yes).

Post your answers to the 3 questions below and I will let you know if you have understood them correctly …


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