If x and y are integers and xy = 660, x or y must be divisible by which of the following numbers?	Choose the correct choice from the following.
A) 4 B) 6 C) 11 D) 20 E) 30
xy = 660 = 2 * 2 * 3 * 5 * 11   One of x or y must be divisible by 11.   The answer is 11.
<result>C</result>
If x and y are integers and xy = 660, x or y must be divisible by which of the following numbers?