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What is the greatest common factor of positive integers x and y

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Intern
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Joined: 08 Jul 2017
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GMAT 1: 620 Q48 V29
What is the greatest common factor of positive integers x and y  [#permalink]

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New post 18 Apr 2018, 03:34
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93. What is the greatest common factor of positive integers x and y?
(1) x and y share only one common factor.
(2) x and y are unique prime numbers.



Any body explain me why stmt 1 is true?
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Re: What is the greatest common factor of positive integers x and y  [#permalink]

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New post 18 Apr 2018, 04:05
Statement (1) I think only one common factor means they are prime numbers. Hence, the only common factor is 1.

SUFFICIENT.

Statement (2) It says that X and Y are unique prime numbers. Hence, without 1 and the numbers (X, Y) them-self there
have not got any other number. Therefore, the maximum common factor is 1.

SUFFICIENT .
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Re: What is the greatest common factor of positive integers x and y  [#permalink]

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New post 18 Apr 2018, 12:09
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Re: What is the greatest common factor of positive integers x and y   [#permalink] 18 Apr 2018, 12:09
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What is the greatest common factor of positive integers x and y

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