It’s the perfect solution to test your intelligence without having to go through a long list of questions.

The world’s shortest IQ test consists of just three math questions, which don’t take too long to answer.

But be careful, it’s quite difficult!

Called the Cognitive Thinking Test, the quiz isn’t new, but was originally part of a research paper published in 2005 by MIT professor Shane Frederick. This document has recently resurfaced online, leaving many people eager to give it a try.

As part of his research, Professor Frederick has given the test to more than 3,000 participants from a variety of educational backgrounds – and even those who attend top US universities such as Yale and Harvard have struggled to find all the answers, reports MirrorOnline.

Of all those who participated, only 17% managed to get three out of three marks on the test, which means that 83% of people failed – how are you going to do?

Speaking of the test, Professor Frederick said: “The three elements of the CRT are ‘easy’ in the sense that their solution is easily understood when explained, but arriving at the correct answer often requires deleting a wrong answer. that ‘impulsively’ pops up in the 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 balloon cost?

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

3. In a lake, there is a patch of water lilies. Every day, the patch doubles in volume. If it takes 48 days for the plot to cover the entire lake, how long would it take for the plot to cover half of the lake?

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These are the three most common answers that people guess – but are actually incorrect.

1. 10 cents

2. 100minutes

3. 24 days

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

“In this case, catching that error is like solving the problem, since almost everyone who doesn’t answer ’10 cents’ does, in fact, give the correct answer.”