Is the prime number p equal to 3

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Is the prime number p equal to 3 [#permalink]

11 Nov 2012, 08:56

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Is the prime number p equal to 3 ?

(1) p = n + 1, where n is a prime number.
(2) p is divisible by 3.

Why is it

[Reveal] Spoiler:

and not C?

[Reveal] Spoiler: OA

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Re: Is the prime number p equal to 3 [#permalink]

11 Nov 2012, 09:02

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Is the prime number p equal to 3 ?

(1) p = n + 1, where n is a prime number. This statement implies that n and p are consecutive numbers and both are primes (also one is even and another odd). The only such pair is 2 and 3. Sufficient.

(2) p is divisible by 3. This statement directly says that p is 3 (which other prime can be divisible by 3?). Sufficient.

Answer: D,
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Intern

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Re: Is the prime number p equal to 3 [#permalink]

13 Nov 2012, 08:05

Bunuel wrote:

Thanks man, silly of me to ignore that point

Re: Is the prime number p equal to 3 [#permalink] 13 Nov 2012, 08:05

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Is the prime number p equal to 3

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