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Prime Numbers

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by leumas » Fri Sep 23, 2011 10:06 pm
If x > 1, what is the value ofinteger x?
(1) There are x unique factors of x.
(2) The sum of x and any prime number larger than x is odd.

OA is A, but i feel the answer should be D. Correct me if I am wrong.
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by shankar.ashwin » Fri Sep 23, 2011 10:36 pm
Using [2] you can just find that x is even, it could be any even number.

So only [1] is sufficient.

I think you carried over data from [1] while reading [2].

A IMO
leumas wrote:If x > 1, what is the value ofinteger x?
(1) There are x unique factors of x.
(2) The sum of x and any prime number larger than x is odd.

OA is A, but i feel the answer should be D. Correct me if I am wrong.
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by leumas » Fri Sep 23, 2011 10:40 pm
shankar.ashwin wrote:Using [2] you can just find that x is even, it could be any even number.

So only [1] is sufficient.

I think you carried over data from [1] while reading [2].

A IMO
leumas wrote:If x > 1, what is the value ofinteger x?
(1) There are x unique factors of x.
(2) The sum of x and any prime number larger than x is odd.

OA is A, but i feel the answer should be D. Correct me if I am wrong.
Ya. That was a mistake of carrying forward. Thanks.
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