This short IQ test has only three questions. 80% of people in the world don’t know the answer

If you like taking tests and solving, then you must take this test. It is called the “Cognitive Reflection Test” and is described as the shortest test that can assess our . He only has three questions, but few people can answer them. It’s not easy, but try to test yourself.

This test is a real challenge. It has only three questions that only a few solve

It was created in 2005 at the Massachusetts Institute of Technology (MIT) by psychologist and professor Shane Frederick. During the research, the scientist tested 3,428 people and it turned out that only a few solved it. Only 17% of respondents gave correct answers to three questions, while 33% gave all incorrect answers. These are the questions the respondents answered.

1. The racket and ball cost a total of $1.10, with the racket costing $1 more than the ball. How much does a ball cost?
2. If it takes five machines five minutes to produce five pieces of gadgets, how long will it take 100 machines to produce 100 pieces of gadgets?
3. There is a cluster of water lilies on the lake and it doubles in size every day. If it takes her 48 days to cover the entire lake, how long will it take to cover half the lake?

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Check the answers to the questions. They weren’t that simple at all

The most common answers were: 10 cents, 100 minutes and 24 days. This is a mistake. What are the correct solutions to the questions? If the racket costs a dollar more, it means they both cost $1.10, so the ball should cost 5 cents, and then the racket will cost $1 and 5 cents, and the difference in price will be $1. We should answer the second question in 5 minutes, because one machine makes a gadget in five minutes, and 100 machines working will make 100 pieces also in 5 minutes. The answer to the third question is: 47. Why? Well, if the plant covers the entire lake in 48 days, then on the 47th day it will cover half of the lake, because each previous day the area not covered with lilies decreases.