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Integer Divisibility Dilemma (Posted on 2014-04-10) Difficulty: 2 of 5
Find all positive integers X and Y such that:
  • X divides Y+5, and:
  • Y divides X+3
Prove that there are no others.

No Solution Yet Submitted by K Sengupta    
Rating: 4.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
more answers | Comment 2 of 6 |
If x = 1, then y can be 1, 2 or 4
If x = 2, then y can be 1 or 5
x can't equal 3
If x = 4, then y can be 7
x can't equal 5
x can't equal 6
if x = 7, then y can be 2

I'm tired of doing this in my head.  I guess I'd better go to algebra

  Posted by Steve Herman on 2014-04-10 10:48:40
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