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Homework Help: Discrete Math Question

  1. Oct 10, 2012 #1
    1. The problem statement, all variables and given/known data
    I attached the problem as file.

    2. Relevant equations

    3. The attempt at a solution
    I honestly do not know how to solve this problem. I have a test tomorrow, and this is really the only question that I am having difficulty with. I don't really know what mod means, especially in this context. I have tried to read the textbook, but it being rather convoluted, and me being constrained on time, was really quite futile.

    Attached Files:

  2. jcsd
  3. Oct 10, 2012 #2


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    Hi Bashyboy! :smile:

    a = 4 (mod 13) means that if you divide a by 13, the remainder is 4

    (of course, that's the same as saying a - 4 = 0 (mod 13), ie a - 4 is divisible exactly by 13 :wink:)

    show us what you get for c = 9a (mod 13) :smile:
  4. Oct 10, 2012 #3


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    Staff Emeritus
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    Here's the attachment:

    "I don't really know what mod means ..." and you have a test on this stuff tomorrow?

    WOW !
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