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number theory

by kanika123 » Sun Aug 04, 2013 10:30 am
Which of the following is a multiple of 5, \forall n\in N?


A. \quad n^6-n^2+10

B. \quad n^{15}-n^{13}+25

C. \quad n^5-n-25

D. \quad n^{13}-n^{15}+35

E. None


A or C?
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by Brent@GMATPrepNow » Sun Aug 04, 2013 10:32 am
kanika123 wrote:Which of the following is a multiple of 5, \forall n\in N?


A. \quad n^6-n^2+10

B. \quad n^{15}-n^{13}+25

C. \quad n^5-n-25

D. \quad n^{13}-n^{15}+35

E. None


A or C?
Hmmm, not sure what "/quad" means.
Can you repost the questions?

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