If x and y are integers greater than 1, is x a multiple of y? A
a. 3y2 + 7y = x
b. x2 - x is a multiple of y
OA is A
a. 3y2 + 7y = x
b. x2 - x is a multiple of y
OA is A
Hi,
From(1) : y(3y+7) = x. So, x is (3y+7) times y and (3y+7) is an integer too. So, x is a multiple of y
Sufficient
From(2) : Choose x= 4, x^2-x = 12(multiple of 3), If y = 3, then x is not multiple of y
If y = 2, then x is a multiple of y
Insufficient
Hence A
Cheers!
