The World’s Shortest Intelligence Test with Only 3 Questions

by copytalkie

Does it seem boring to you to solve long intelligence tests? Even if you get a high score while solving the intelligence test, do you give up because you are bored? An intelligence test that was published in 2005 but recently hit the Internet may be exactly the test you are looking for.

If you have wanted to test your intelligence before, but if solving questions for hours did not suit you, we can say that we have a test for you. The world’s shortest intelligence test consists of just three simple math questions. Still, more than 80% of people who took this ‘simple’ test cannot successfully complete all of the questions in the test.

Although this test is not a new test, it was prepared in 2005 by MIT professor Shane Frederick. The work became available very recently, and questions arose.

For one piece of the research, Professor Frederick, who gathered 3,000 people who had different education lives, found that even students at America’s most prestigious universities such as Yale and Harvard gave wrong answers in the test. Of course “A mistake is not so important” You can say, but a single mistake reduces your success rate to 66.6%.

Only 17% of the 3,000 people who took the test gave correct answers to all three questions. Now it’s your turn. Let’s start if you trust yourself.


1. A baseball bat and baseball are sold for 1.10 liras in total. The stick is 1 lira more than the ball. How much does the ball cost?

2. If five machines can produce five parts in five minutes, how long does it take 100 machines to produce 100 parts?

Intelligence test

3. There is a lotus leaf in a lake. This lotus leaf grows twice its size every day. If it takes 48 days for a lotus leaf to cover the entire lake, how many days does it take to cover half of the lake?

As you can see, the questions consist of four operations entirely, and you don’t have to use interesting or complex formulas. Well, did you get the answers? If you have reached, let’s share the answers immediately.


1.10 cents

2.100 minutes

3. 24 days

When you see the answers “Well it was very easy. How did 83% of the participants do so wrong? I did all three right.” If you said, you are right. The questions seem really easy and the answers are not that hard to come by. The hard thing is to get the right answers and we regret that you didn’t get the right answers.

iq test

Correct answers:

1.5 cents

2.5 minutes

3.47 days

We apologize to our readers who found these answers but were shocked when they just saw the ‘answers’ section. Who thinks he has just given the correct answer but seeing the ‘correct answers’ part “How?” Let’s move on to the explanations of the answers for those who ask the question.


1. Let X be the price of the ball. The stick is also sold at a price of X + 1. So the sum of the price of the stick and the ball is X + (X + 1). This corresponds to 1.1 TL (1 lira 10 kuruş). When we arrange our equation, it becomes 2X + 1 = 1.1. When we subtract 1 from both sides, 2X = 0.10 TL. So the price of the X ball is equal to 5 cents.


2. If it takes five minutes for five machines to make five parts, then one machine takes five minutes to make one part. If your 100 machines are working together, it takes five minutes for one machine to make one part, so 100 parts will take five minutes to make.

3. We have a lotus leaf that doubles its size every day. In other words, we can say that while this leaf reaches twice the size the next day, it also decreases to half the size of the previous day. For this reason, the lotus leaf covering the entire lake on the 48th day covered half of the lake on the 47th day.

How did your test go? Did you answer all the questions correctly? You can share your results with us from the comments section.

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