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# What is the greatest common factor of positive integers x

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Director
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What is the greatest common factor of positive integers x [#permalink]

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19 Sep 2004, 13:42
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What is the greatest common factor of positive integers x and y?

(1) The greatest common factor of and is 5.
(2) x and y are even.
Director
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19 Sep 2004, 14:16
Something is missing, isn't it ?
Director
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19 Sep 2004, 14:19
OOps sorry, stem 1 should read 'the GCF of x/2 and y/2 is 5'.
Director
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19 Sep 2004, 14:30
Answer is A, 5 being greater than 2 it remains the CGF
Manager
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21 Sep 2004, 09:50
i also have A but i think GCF for the situation in A would be 10 rather than 5.

ex. 10/2 and 30/2

anything ending in 5 would not be an integer when divided by 2.
Intern
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21 Sep 2004, 22:38

Ice T I am no sure what you mean by "anything ending in 5 would not be an integer when divided by 2."

Its given that the number does not end in 5 becuase X/2 and Y/2 are integers. Therefore X & Y has to be even integers.
21 Sep 2004, 22:38
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