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Without Googling can you solve this six year math problem in 20 seconds?

Discussion in 'Member Casual Chat' started by Spooky, Jun 25, 2018.

  1. Spooky

    Spooky Well-Known Member Past Donor

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    It was a test given to six year olds and they were given 20 seconds to solve it.

    If you get it don't give the answer just say yes or no.

    For the record, I didn't get it in 20 seconds, I actually had to read the link to solve it.

    Your turn.

    [​IMG]
     
    Spooky, Jun 25, 2018
    #1
  2. perdidochas

    perdidochas Well-Known Member

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    I didn't solve it. What's the link?
     
    perdidochas, Jun 26, 2018
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  3. Liberty Monkey

    Liberty Monkey Well-Known Member

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    Yes took me 3 seconds
     
    Liberty Monkey, Jun 26, 2018
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  4. HereWeGoAgain

    HereWeGoAgain Banned

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    It's not really a math problem. In fact there is no mathematical solution. It is a brain teaser.
     
    Last edited: Jun 27, 2018
    HereWeGoAgain, Jun 27, 2018
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  5. Spooky

    Spooky Well-Known Member Past Donor

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    Well I will tell you that the answer is 87.

    See if you can get it from there.
     
    Spooky, Jun 27, 2018
    #5
  6. perdidochas

    perdidochas Well-Known Member

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    I agree. That's what stumped me.
     
    perdidochas, Jun 27, 2018
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  7. cerberus

    cerberus Well-Known Member Past Donor

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    I couldn't've solved it with Google! I'm so thick you wouldn't believe it. :lonely:
     
    cerberus, Jul 4, 2018
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  8. reallybigjohnson

    reallybigjohnson Banned

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    Took about 5 seconds.

    Hint: Think about how the numbers would look if you pulled the car into the parking stall. :p
     
    Last edited: Jul 4, 2018
    reallybigjohnson, Jul 4, 2018
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  9. Doug1943

    Doug1943 Well-Known Member Past Donor

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    It's only a maths problem in the sense that one of the heuristics for solving problems in mathematics is to 'turn the problem upside down' -- or, more broadly, see if
    you can apply a transformation to the problem that retains its original structure, but lets you see it from another angle. For instance, to add all the numbers from 1 to
    100 ... 1 + 2 + 3 .... + 97 + 98 + 99 + 100 .... try adding them in a different order ...0+ 100, 1 + 99, 2 + 98, 3 + 97 ...

    I got this one right away ... but only because I had seen it before. And didn't get it the first time.
     
    Doug1943, Jul 4, 2018
    #9

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