- 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
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.
Are you emotionally intelligent? Take this test and find out what it reveals about your personality
There are 9 animals in this optical illusion – which one you see first reveals your personality
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.
Riddle me tell: 7 riddles that will leave you perplexed
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
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
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.