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Greatest Common Factor / LCM

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by smohsin » Mon Oct 27, 2008 6:38 am
If x and y are positive integers, what is the value of xy

1) The greastest common factor of x & y is 10
2) The least common multiple of x & y is 180

Thanks,
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Source: — Data Sufficiency |
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Re: Greatest Common Factor / LCM

by parallel_chase » Mon Oct 27, 2008 7:12 am
smohsin wrote:If x and y are positive integers, what is the value of xy

1) The greastest common factor of x & y is 10
2) The least common multiple of x & y is 180

Thanks,
product of two integers = LCM * GCF

Statement I and II are clearly insufficient alone.

Combining I & II

GCF = 10
LCM = 180

xy = 10*180

Hence C.

Hope this helps.
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by smohsin » Mon Oct 27, 2008 7:18 am
Is that a formula of sorts? "Product of 2 integers=GCF*LCM?

If it is then it helps a lot! Thanks :D
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by parallel_chase » Mon Oct 27, 2008 7:30 am
smohsin wrote:Is that a formula of sorts? "Product of 2 integers=GCF*LCM?

If it is then it helps a lot! Thanks :D
Yes indeed it is like a formula.
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by aj5105 » Fri Nov 14, 2008 12:48 am
product of x & y = GCF * LCM
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by Natalllllia » Mon Dec 01, 2008 8:43 pm
GCF * LCM ,
where
GCF = the greatest common factor
LCM = the least common multiple
_____
:lol: got me too
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