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Director
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If n is a prime number greater than 3, what is the remainder [#permalink]
 24 Jan 2005, 11:01
Question Stats:
0% (00:00) correct
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If n is a prime number greater than 3, what is the remainder when n^2 is divided by 12?
(A) 0
(B) 1
(C) 2
(D) 3
(E) 5
Last edited by vprabhala on 24 Jan 2005, 12:14, edited 1 time in total.
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Director
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i am sorry. i was trying to copy from a pdf.. anyways.. edited it now..
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Current Student
Joined: 28 Dec 2004
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Location: New York City
Schools: Wharton'11 HBS'12
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B it is...
look at the unit digits of n^2 they are 5, 9, 1, 9 ...etc
if you look at the 25/12 remainder is 1 if u look at 49/12 remainder is 1...
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