If n and p are integers greater than 1 and if p is a factor of both n+3 and n+10, what is the value of p?

(a)3

(b)7

(c)10

(d) 13

(e)30

the answer is b but i don't know why

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- January 2nd 2010, 01:13 AM #1

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- January 2nd 2010, 02:13 AM #2

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