If 9 is a factor of 2y, then which of the following may not be an integer?	Choose the correct answer.
A) 6y/54 + 2y/3	B) (4y-18)/9	C) (2y+27)/9	D) (81-4y^2)/81	E) (2y-3)/3
I got the right answer A after plugging in 18 for y.   While going through Kaplan's explanation, I couldn't understand the part about choice A.   "6y/54 + 2y/3 = 3/6 * 2y/9 + 2y/3.   Since 9 is a factor of 2y, 3 is also factor of 2y. So 2y/3 is an integer, as is 2y/9. But 3/6 = 1/2, so if 2y/9 is not even, the expression 3/6 * 2y/9 will not be even."   But, isn't 2y/9 always even? 9 is a factor of 2y, which means that we could have 2(9), 2(2)(9), 2(3)(9), and so forth. The 9 in the denominator cancels out the 9 in the numerator. So we are left with 2 * something. So 2y/9 is even.6y/54 + 2y/3
<result>A</result>
If 9 is a factor of 2y, then which of the following may not be an integer?