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3-2=1, which is not prime, whereas 5-3=2, which is prime. Therefore, the answer must be x=5 and y=2 (5+2=7). The answer should be C, both together are sufficient to answer the question!

3-2=1, which is not prime, whereas 5-3=2, which is prime. Therefore, the answer must be x=5 and y=2 (5+2=7). The answer should be C, both together are sufficient to answer the question!

from (1)+(2) we have x=5, y=3 x=5, y=2 "1" is not a prime, so x=3, y=2 doesn't fit. 2 possible options. Looks like (E)

gmatclubot

Re: Prime integers
[#permalink]
06 Aug 2010, 01:26

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