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Discrete Math Question

  • Thread starter Bashyboy
  • Start date
  • #1
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Homework Statement


I attached the problem as file.


Homework Equations





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.
 

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Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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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:
 
  • #3
SammyS
Staff Emeritus
Science Advisor
Homework Helper
Gold Member
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Homework Statement


I attached the problem as file.

Homework Equations



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.
Here's the attachment:
attachment.php?attachmentid=51751&d=1349900977.jpg


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

WOW !
 

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