Thank you for helping me understand this problem!
If x and y are positive integers, what is the value of xy?
1. The greatest common factor of x and y is 10.
2. The least common multiple of x and y is 180.
Ans. B
GCF / LCM DS Problem
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RoadtoIVY wrote:For any two positive integers x and y:
xy = (GCF of x and y) X (LCM of x and y)
In this case, it would be 10 X 180 = 1800
so C is the answer.
But mlaboda says OA is B
That is incorrect. Please refer to this page:
https://www.manhattangmat.com/forums/if- ... -t282.html
https://www.manhattangmat.com/forums/if- ... -t282.html
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- Legendary Member
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RoadtoIVY wrote:For any two positive integers x and y:
xy = (GCF of x and y) X (LCM of x and y)
In this case, it would be 10 X 180 = 1800
so C is the answer.
Where this rule come from? could you please explain this rule by a simple example of two integers?
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it is a simple proof, but hard to type here. Check hereheshamelaziry wrote:RoadtoIVY wrote:For any two positive integers x and y:
xy = (GCF of x and y) X (LCM of x and y)
In this case, it would be 10 X 180 = 1800
so C is the answer.
Where this rule come from? could you please explain this rule by a simple example of two integers?
https://books.google.com/books?id=KJwvt2 ... ax&f=false