World's Shortest IQ Test Has Just 3 Questions That Defy Logic

This kind of analysis it is a way of testing our knowledge, but most of them are full of questions and, therefore, are long and even somewhat tiring. The one we will see below, for example, is known as the Cognitive Reflection Test. It only has three questions, but only 17% of people can answer them.

Read more: IQ Test: How many books do you see in the picture?

Initially the proposal may seem simple, but it disapproved 83% of internet users who tried to win it.

IQ Test Stimulates Cognitive Reflection

It is part of research developed in 2005 by Shane Frederick of the Massachusetts Institute of Technology. At the time, the professor applied the test to more than 3,000 students. He claims that to find the right answer you need to suppress the wrong solution that will come to your mind.

Check out the three questions:

1. A bat and a ball cost R$1.10 in total. The bat costs $1 more than the ball. What is her worth?
2. If five machines take five minutes to make five cycles, how long does it take 100 machines to make 100 cycles?
3. In a lake, there is a bed of royal water lilies. Every day, the garden doubles in size. It takes 48 days for the surface of the water lilies to cover the entire lake. How long will it take them to cover half of it?

Answers People Find But Are Wrong

The answers below are the most common and given by test takers, however they are incorrect.

1. R$ 0.10 is the value of the ball;
2. 100 minutes;
3. 24 days.

For the teacher who created the test, just one reflection quick for the person to recognize that, for example, the difference between R$ 1 and R$ 0.10 is R$ 0.90, not R$ 1 as it implies.

As this is the main error of the problem, when someone answers that the difference is R$ 0.10, he is wrong.

Check the correct answers below:

1. BRL 0.05;
2. Five minutes;
3. 47 days.