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Math Help - More congruences

  1. #1
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    More congruences

    Let s be the sum of the digits of a number n e N written in base 10. Show that n and s are congrent modulo 9
    Last edited by jzellt; March 17th 2009 at 11:40 PM. Reason: mis typed
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  2. #2
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    I'm assuming that you're referring to the sum of the digits.

    Here: congruence
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  3. #3
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    yes...sorry about that
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