Photo: Times Now Digital

#### HIGHLIGHTS

• The world’s shortest IQ test was part of a 2005 research paper by MIT professor Shane Frederick
• He only has three questions
• Only 17% manage to answer all the questions correctly

You want to test your intelligence, but you don’t want to sit for long IQ test?

We have the perfect solution for you!

This is the world’s shortest IQ test. It consists of only 3 questions and will not take too long to complete. But know that it is quite difficult.

The IQ test called Cognitive Reflection Test was part of a research paper published in 2005 by MIT professor Shane Frederick.

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More than 3,000 participants from various educational backgrounds took the test.

Corn only 17% managed to obtain three marks out of three.

It means that 83% of people FAILED the world’s shortest IQ test.

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The world’s shortest IQ test

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?

World’s Shortest IQ Test Answers People Guess But Are Incorrect

1. 10 cents

2. 100minutes

3. 24 days

If you want to try again, scroll up.

Scroll down when you’re ready to check out the correct answers to the world’s shortest IQ test answers.

The World’s Shortest IQ Test Answers

1. 5 cents

25 minutes

3. 47 days

World’s Shortest IQ Test Answers Explained

1. Suppose the ball costs X. Then the bat costs \$1 more, so it is X + 1. So we have bat + ball = X + (X + 1) = 1.1 because together they cost \$1.10. This means 2X + 1 = 1.1, then 2X = 0.1, so X = 0.05. This means that the ball costs 5 cents and the bat costs \$1.05.

2. If it takes 5 minutes for 5 machines to create 5 widgets, it takes 5 minutes for 1 machine to create 1 widget (each machine makes a widget in 5 minutes). If we have 100 machines working together, each can create a widget in 5 minutes. So there will be 100 widgets in 5 minutes.

3. Each day, the FORWARD patch doubles in size. So every day BACKWARDS means the patch halves. Thus, on day 47, the lake is half full.

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