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What is the value of positive integer x?

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Joined: 02 Sep 2009
Posts: 49300
What is the value of positive integer x?  [#permalink]

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New post 09 Oct 2017, 00:11
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

78% (00:27) correct 22% (00:33) wrong based on 87 sessions

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Joined: 29 Aug 2017
Posts: 35
Re: What is the value of positive integer x?  [#permalink]

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New post 09 Oct 2017, 00:24
Bunuel wrote:
What is the value of positive integer x?

(1) x has exactly 2 positive factors.
(2) When x is divided by 2, the remainder is 0.


x > 0, x = ?

Statement 1:
x is a prime number. This statement is insufficient because there are infinite prime numbers.

Statement 2:
x is a multiple of 2. This statement is insufficient because there are infinite multiples of 2.

Combining statements 1 and 2:
x is a prime number and multiple of 2. So, x is 2.
Therefore, answer is C.
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Re: What is the value of positive integer x?  [#permalink]

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New post 09 Oct 2017, 10:19
St 1 - x is a prime number but which prime number, is not clear hence insufficient.
St 2 - the remainder is 0, when divided by 2, whicj are infinite number.
St1 + st2 - x is 2, as it is a prime number and divisible by 2. Hence answer C

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Re: What is the value of positive integer x? &nbs [#permalink] 09 Oct 2017, 10:19
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