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If integer p is greater than 1, is p a prime number?

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If integer p is greater than 1, is p a prime number?  [#permalink]

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New post 05 Jul 2018, 01:35
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

96% (00:27) correct 4% (02:18) wrong based on 56 sessions

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Re: If integer p is greater than 1, is p a prime number?  [#permalink]

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New post 05 Jul 2018, 01:48
1 stm: Obviously not suff.
2 stm: we can formulate the definition of a prime number: An integer with 2 positive factors 1 and itself. sufficient

In My Opinion
Ans: B
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Re: If integer p is greater than 1, is p a prime number?  [#permalink]

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New post 05 Jul 2018, 09:19
Bunuel wrote:
If integer p is greater than 1, is p a prime number?

(1) p is odd.

(2) The only positive factors of p are 1 and p.



Given p>1 and p is an integer.

Question stem:- Is p a prime number

Statement-1:- p is odd
So, P=3,5,7,9,11,13,15..etc.
P is prime when p=3,5,7,11 etc and p is not prime when p=9,15 etc.
hence insufficient.
Statement-2:- The only positive factors of p are 1 and p.
It implies that p is a prime number.
Hence, sufficient.

Ans. (B)
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Re: If integer p is greater than 1, is p a prime number?  [#permalink]

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New post 06 Jul 2018, 05:01
Bunuel wrote:
If integer p is greater than 1, is p a prime number?

(1) p is odd.

(2) The only positive factors of p are 1 and p.


(1) p is odd.

P = 3

P =15

Insufficient

(2) The only positive factors of p are 1 and p.

This is the definition of prime number.

2,3,5,7...etc all have 2 factors 1 & itself

Sufficent

Answer: B
Re: If integer p is greater than 1, is p a prime number? &nbs [#permalink] 06 Jul 2018, 05:01
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