Are you smart enough for the world’s shortest IQ test?

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A three-question puzzle, dubbed the world’s shortest IQ test, baffled 83% of participants.

Called the Cognitive Thinking Test, the quiz is part of a research paper published in 2005 by MIT Professor Shane Frederick.

But it has since resurfaced online with people keen to test their IQs after Professor Frederick offered it to more than 3,000 participants more than 10 years ago.

Participants from a variety of educational backgrounds, including top US universities such as Yale and Harvard, struggled to find all the answers.

Of all those who participated, only 17% managed to get three out of three points on the test, which means that 83% of people failed, Mirror Online reports.

Speaking about the test, Prof Frederick said: “The three elements of CRT are ‘easy’ in the sense that their solution is easily understood when explained, but achieving the correct answer often requires removing an erroneous answer which sprang “impulsively ‘to mind.”

Here is an overview of the questions:

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?

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?

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These are the three most common answers people guess – but they actually are Incorrect.

1.10 cents

2.100 minutes

3. 24 days

Professor Frederick adds: “Anyone who thinks about it for a moment would agree that the difference between $ 1 and 10 cents is only 90 cents, not $ 1 as the problem states.

“In this case, detecting this error is tantamount to fixing the problem, because almost everyone who does not answer” ten cents “does, in fact, give the correct answer.”

Scroll below this image of the hunters for the real answers:



Mark Labbett, Paul Sinha, Jenny Ryan and Shaun Wallace with Best Quiz award for The Chase in the press room at the 2019 National Television Awards
Mark Labbett, Paul Sinha, Jenny Ryan and Shaun Wallace with Best Quiz award for The Chase in the press room at the 2019 National Television Awards

The correct answers are:

1.5 cents

25 minutes

3. 47 days


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