Recent content by jmn_153

  1. J

    Odd Integer Divisibility Proof: n+5 or n+7 divisible by 4?

    oh ok, thanks for your help What's mod?
  2. J

    Odd Integer Divisibility Proof: n+5 or n+7 divisible by 4?

    Can't figure it out Prove that if n is an odd positive integer, then one of the numbers n+5 or n+7 is divisible by 4 My thoughts I don't know if this is right- Multiply n+5 and n+7, because if one of them is a multiple by 4 then shouldn't their product be divisible 4
  3. J

    Don't know where to start when doing these proofs

    ok, thanks for your help I'll keep trying
  4. J

    Don't know where to start when doing these proofs

    yea, Buit I'm not sure what the proper way to start it off is
  5. J

    Don't know where to start when doing these proofs

    Can anyone please help me with this proof Prove that every positive integer, ending in 5 creates a number that when squared ends in 25
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