Is x^2 * y^2 an integer divisible by 9?
1) x is an integer divisible by 3
2) x*y is an integer divisible by 9
Could someone please explain the fastest way to solve this problem?
I appreciate the help!
i am not looking at others explanations, i want to reason this on my own... so i might repeat others, i could be wrong.
gut instinct is to pick A and move on... but we still need to know what Y is. y could be a fraction and then the answer could be no.
II: xy = 9*integer
theres lots of combinations that could yield a true statement here.
all divisible by 9. I say B.