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Thread: More congruences

  1. March 17th 2009, 10:12 PM #1
    jzellt
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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 10:40 PM. Reason: mis typed
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  2. March 17th 2009, 10:26 PM #2
    o_O
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    I'm assuming that you're referring to the sum of the digits.

    Here: congruence
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  3. March 17th 2009, 10:40 PM #3
    jzellt
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    yes...sorry about that
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« Proof - What conditions are necessary on q for it to be a divisor of a^p+1 if... | Congruences »

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