The shortest test for IQ: only 17 percent of people can pass it

It takes only three questions to find Einstein among less gifted people. This test, developed by psychologist Shane Frederick at Princeton University in 2005, tests your ability to ignore your instinctive reaction and think leisurely and more rationally. In other words, how well you are able to neglect intuitive thinking in favor of the analytical.

The cognitive ability test (CRT) is considered the shortest IQ test. To successfully pass it, you need to think carefully about your answers and question your intuitive response. To know if you are a genius, you need to answer all three questions correctly, but the speed with which you gave an answer is also important. The faster you answered, the higher your intelligence.

So how smart are you? Remember that the questions are not as simple as they seem. Even students of famous universities, including Harvard, could not answer all three questions correctly.

Moreover, only 17 percent of them were able to get the highest score for this test.

1. Baseball bat and ball together cost 1 dollar 10 cents. Bit is more expensive than a ball for 1 dollar. How much does the ball cost?

2. 5 machines in 5 minutes produce 5 parts. How long will it take 100 machines to make 100 parts?

3. In the pond there is a plot on which water lilies grow. Every day the area of ​​this site is doubled. If in 48 days the site covers the entire lake, how long does it take for the water lilies to cover half the pond?

Find answers below:
Answers to the IQ test

1. Correct answer: 5 cents.
   Most people respond 10 cents. In fact, less: if the ball costs 5 cents, and the bit per dollar is more expensive, that is, 1 dollar 5 cents, then we get 1.10 dollars. Scientists have found out that people who answered 10 cents are much less patient than those who gave the right answer.

2. Correct answer: 5 minutes
   Perhaps you wanted to answer 100 minutes. However, from the question it is clear that it takes 5 minutes for 1 machine to make 1 part. Based on this, it takes 5 minutes for 100 machines to produce 100 parts.

3. Correct answer: 47 days
   It's not 24 days, as you thought. Intuitively, it seems that you need to divide in two the number of days, since you reduce the area with water lilies by half. But, if the area with water lilies doubles every day, it will take only one day to get it completely covered with water lilies from half overgrown. So, we subtract 1 day from 48 and get 47 days.