Barack Obama, Bill Gates, Mark Zuckerberg or Natalie Portman are among the celebrities who studied at Harvard University, recognized as one of the most prestigious centers of higher education in the world, published 20minutos.es
Professor Shane Frederick has created a test to measure the ability of cognitive reflection, which have faced 3,428 students of this university.
Approximately 30% of the students failed to resolve any of the questions, and 80% failed at least one.
Test your logic and reflective capacity
1. A bat and a ball together cost $ 1.10. The bat costs a dollar more than the ball. How much does the ball?
2. If 5 machines make 5 items in 5 minutes, how long they will spend 100 machines to make 100 articles?
3. In a lake there is a surface covered with water lilies and every day that extension doubles in size. If it takes 48 days to cover the lake, how long it take to cover half the lake?
According to Professor Frederick, usually initially looking for the quickest response. However, correctly answer those who take a more thoughtful and methodical approach, overcoming the "barrier" of the first reaction.
In other words, our brain works on two levels of depth: superficial thinking is responsible for daily actions and the first reactions. Analytical thinking is responsible for processing and analyzing the most important information to give an answer.
How much does the ball?
If you answered 10 cents you're wrong. Baseball bat costs 1 dollar more than the ball, which means that if not cost a dollar more than she would have the same value. So divide the remaining money, 10 cents between the two products, ie 5 cents.
How many take 100 machines?
If a hard 5 machines 5 minutes to 5 items, then 1 machine costs 5 minutes to 1 item. If we have 100 machines, each will need 5 minutes to prepare an article. If the 100 work at the same time, we will need 5 minutes to 100 players. Therefore the answer is 5 minutes.
How long you will be covered lake middle?
Perhaps the easiest way to understand this conundrum is respondiéndolo from the end. If the lake is covered in 48 days, and every day the size of the surface of water lilies doubles, then half of the lake will cover one day before doubled in size and is completely covered. Therefore, 47 days.