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How to prove that it does not exist a natural number having the

  1. Sep 22, 2012 #1
    How to prove that it does not exist a natural number having the property that the permutation of the first digit with the last one produces a new number being 5 times bigger compared to the original one

    Regards
     
  2. jcsd
  3. Sep 22, 2012 #2

    Ray Vickson

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    Re: Interesting

    Does "5 times bigger" mean that one number is 5 times the size of the other, or does it mean that one is 6 times the other (so the amount by which is is bigger is 5 times)?

    RGV
     
  4. Sep 22, 2012 #3
    Re: Interesting

    no problem just figured it out.
    thx
     
  5. Sep 22, 2012 #4

    Ray Vickson

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    Re: Interesting

    So, what was the answer to the question I asked?

    RGV
     
  6. Sep 22, 2012 #5
    Re: Interesting

    that one number is 5 times the size of the other
     
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