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Thread: Manxy's challenge 3

  1. Feb 21st, 2006, 06:32 PM #1
    manxy1
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    Manxy's challenge 3

    I'm not sure if you like me adding something to the boards, or you're fed up with me putting teasing questions in, but send me a message or let me know what you think.
    So here's my next challenge!

    Suppose you had a life-size map of the world, made of paper. The thickness of the paper is 0.1 millimetres.

    Now, suppose you fold it in half. Then you fold it in half again, and again, and again. In all, you fold it in half 40 times.

    How thick would the folded paper be? Please give your answer in metres, round to the nearest metre, and exclude any punctuation or extra information.

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  2. Feb 22nd, 2006, 12:16 AM #2
    gigemboy
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    Re: Manxy's challenge 3

    109,951,163 Meters
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  3. Feb 22nd, 2006, 01:43 AM #3
    phrajib
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    Re: Manxy's challenge 3

    It is 109951163 meter. Is it?

    Note: (0.1 X 2^40) /1000 meter



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    Dhaka, bangladesh
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  4. Feb 22nd, 2006, 05:58 AM #4
    fahad k
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    Re: Manxy's challenge 3

    You cannot fold a paper into halves more than 7 times.
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  6. Feb 23rd, 2006, 06:16 PM #5
    manxy1
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    Re: Manxy's challenge 3

    Ah! you are correct with regards that answer, but just suppose that you could, what would be the answer then?
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  7. Feb 23rd, 2006, 06:19 PM #6
    manxy1
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    Re: Manxy's challenge 3

    109951163 metres is the right answer
    Congratulations phrajib *clap*
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  8. Feb 23rd, 2006, 10:43 PM #7
    gigemboy
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    Re: Manxy's challenge 3

    Quote Originally Posted by manxy1
    109951163 metres is the right answer
    Congratulations phrajib *clap*
    *ahem* I said that first...
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  9. Feb 26th, 2006, 12:51 PM #8
    manxy1
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    Re: Manxy's challenge 3

    Congratulations on your answers
    Answer: 109951163 metres

    Methinks I should try to make it harder
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  11. Mar 2nd, 2006, 02:08 PM #9
    dsheller
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    Re: Manxy's challenge 3

    Quote Originally Posted by fahad k
    You cannot fold a paper into halves more than 7 times.
    http://www.sciencenews.org/articles/...4/mathtrek.asp

    It appears seven isn't the limit.


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  12. Mar 6th, 2006, 07:26 AM #10
    fahad k
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    Re: Manxy's challenge 3

    Okay.Thanks for enlightening me.
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