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# If x and y are positive integers, what is the value of xy?

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Director
Joined: 24 Oct 2005
Posts: 660
Location: London
Followers: 1

Kudos [?]: 9 [0], given: 0

If x and y are positive integers, what is the value of xy? [#permalink]  22 May 2006, 06:19
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0% (00:00) correct 0% (00:00) wrong based on 2 sessions
If x and y are positive integers, what is the value of xy?

1) the greatest common factor of x is 10
2) the lcm of x and y is 180.

Senior Manager
Joined: 09 Mar 2006
Posts: 445
Followers: 1

Kudos [?]: 6 [0], given: 0

C it is

GCF(X,Y) * LCM(X,Y) = X*Y
VP
Joined: 29 Dec 2005
Posts: 1348
Followers: 7

Kudos [?]: 37 [0], given: 0

Re: DS [#permalink]  22 May 2006, 12:17
remgeo wrote:
If x and y are positive integers, what is the value of xy?

1) the greatest common factor of x is 10
2) the lcm of x and y is 180.

incomplete question..... "greatest common factor of x is 10"?
Director
Joined: 06 May 2006
Posts: 780
Followers: 3

Kudos [?]: 17 [0], given: 0

Re: DS [#permalink]  22 May 2006, 13:25
Professor wrote:
remgeo wrote:
If x and y are positive integers, what is the value of xy?

1) the greatest common factor of x is 10
2) the lcm of x and y is 180.

incomplete question..... "greatest common factor of x is 10"?

True - 1) has to be GCF of x and y...

And answer has to be C.
Manager
Joined: 05 Jan 2006
Posts: 66
Followers: 1

Kudos [?]: 4 [0], given: 0

If I were taking the test, I would guess C. I know that each is insufficient, but not exactly sure how to break it down far enough to differentiate between C and E.

Anyone?
SVP
Joined: 30 Mar 2006
Posts: 1737
Followers: 1

Kudos [?]: 46 [0], given: 0

C. Provided 1) means GCF of x and y is 10

GCF(of two numbers) * LCM(of two numbers) = product of the numbers

Hence both the statements are required.
Director
Joined: 06 May 2006
Posts: 780
Followers: 3

Kudos [?]: 17 [0], given: 0

x242222 wrote:
If I were taking the test, I would guess C. I know that each is insufficient, but not exactly sure how to break it down far enough to differentiate between C and E.

Anyone?

product (x, y) = lcm (x,y) * gcf (x,y)

Thats a formula to mug
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