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Prep test I

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Prep test I

by Oxana » Fri Sep 12, 2008 7:47 pm
If x and y are positive integers, what is the value of xy?

I the greatest common factor of x and y is 10

II the list common multiple of x and y is 180
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Re: Prep test I

by parallel_chase » Fri Sep 12, 2008 8:21 pm
Oxana wrote:If x and y are positive integers, what is the value of xy?

I the greatest common factor of x and y is 10

II the list common multiple of x and y is 180
Answer should be C.

Product of 2 numbers = LCM * GCD

xy = LCM (x&y) * GCD (x&y)


xy = 10*180 = 1800

Hope this helps.
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