help !!!!!!!! GCI !!!!

[charmaine]

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. C

thank u

[Ian Stewart]

If you multiply the LCM and the GCD of two numbers, you always get the product of the two numbers. Or written as an equation,

LCM(x,y)*GCD(x,y) = x*y

So the answer is C.