If the positive integer x is a multiple of 9/15 and the positive integer y is a multiple of 5/3, then xy must be a multiple of which of the following?
I. 5
II. 3
III. 1
Choose the most appropriate option.
A) II only  B) I and II only  C) I only  D) III only  E) I, II, and III
x=9/15a   y=5/3b   xy=3/3ab=ab   where a,b are integers   Hence , xy will always be divisible by 1.   III only is the answer.
<result>D</result>
If the positive integer x is a multiple of 9/15 and the positive integer y is a multiple of 5/3, then xy must be a multiple of which of the following?
I. 5
II. 3
III. 1