Test Your IQ With Only Three Questions

18:59' 16-05-2018
A key factor in intelligence is how well you pay attention to the details. Sometimes a question seems simple, with an obvious answer, but if you overlook one thing, you will get it wrong.

    Kết quả hình ảnh cho IQ

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    Most IQ tests involve a large number of questions, but the world's shortest IQ test has only three. It

    was published in The Journal of Economic Perspectives by psychologist Shane Frederick in 2005, after a little over two years research.

    The test was given to 3,428 respondents in 35 separate studies over a 26-month period. Only 17% of students from the top universities in the world got a perfect score.

    Try the questions yourself, then check your answers below.

    Bat and Ball

    A bat and a ball together cost $1.10. The bat costs $1 more than the ball. How much does the ball cost?

    The Widget Machine

    If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?

    The Lily Pad Patch

    Every day, a patch of lily pads in a lake doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take to cover half the lake?


    Many people guess the ball costs 10 cents. If this were the case, then the bat would cost only 90 cents.

    For the Widget Machine, change the question, and ask yourself how long it takes for one machine to make one widget. Then you will see that the number of machines is irrelevant.

    Be careful with the wording of this question. It is easy to think that if the whole lake is covered in 48 days, then to cover half the lake would take half that time, or 24 days. However, when the lake is half covered, and the lilies are doubling each day, it will only take one day to cover the whole lake.

    Park W




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    Test Your IQ With Only Three Questions Rating: 4.5 / 5 stars from 2 votes.
Keywords: iq testsresearchthe journal of economic perspectives

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