If m and n are nonzero integers and 390m = 150n, then mn must be divisible by
Select the correct option: A) 10 B) 45 C) 50 D) 65 E) 75
390m = 150n;   m/n = 5/13.   m is a multiple of 5 and n is a multiple of 13, therefore mn must be a multiple of 5*13= 
<gadget id="calculator">5*13</gadget>
<output>65</output>
65.   Answer: 65.
<result>D</result>
If m and n are nonzero integers and 390m = 150n, then mn must be divisible by