Try the world’s shortest IQ test with only THREE questions

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SHORT AND SOFT

Want to be a bit of an idea box? While these three questions may seem easy enough to confirm that you are a genius, the answers might make you think again.

THREE questions separate you from an average intelligence and full-fledged suggestion box – but are they as simple as they sound?

The Cognitive Reflection Test has been hailed as the world’s shortest IQ test because it only has three questions.

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These three questions are much harder than they seem

Each is designed to assess your ability to identify a simple problem that might actually be more difficult than it first appears.

Not only do the boffins claim that getting the right answer is a sign of genius, but also the time frame within which you come up with your solution.

Take the world’s shortest IQ test

  1. A bat and ball cost £ 1.10 in total. The bat costs £ 1.00 more than the ball. How much does the ball cost?
  2. If it takes 5 machines 5 minutes to create 5 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?

Now that you understand the questions, chances are you answered 10p for question 1, 100 minutes for question 2, and 24 days for question 3.

If you did, you’d be wrong.

Scroll down to see the correct answers to the test and how each one works.


1. The bullet would actually cost 0.05 pence.

If the bat costs £ 1 more than the bat, you have to think outside the box.

While it can be easy to assume that the ball is 10p, that would make the bat £ 1.10 as it costs £ 1 MORE than the ball.

In order to keep the total at £ 1.10, the ball MUST be 5 pence – and the bat is worth £ 1.05.

2. It would take 5 minutes to make 100 widgets

Five machines can make five widgets in five minutes.

This means that a machine will also create a widget in five minutes.

Therefore, 100 machines all making widgets can create 100 widgets in 5 minutes.

3. It would take 47 days for the patch to cover half of the lake,

The patch doubles in size each day it advances, so it would be halved backwards.

This means that on day 47, the day before he covered the entire lake, he would be halfway there.


Fancy more mental gymnastics? Try these questions from a real math GCSE.

And this mushy quiz from Greggs is REAL food for thought.

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