If A and B are digits and 5AB is a 3-digit number that is divisible by 10, which of the following is a possible product of A and C?
Choose the correct choice
A) 57 B) 21 C) 52 D) 38 E) 50
Key to this question is to remember the fact that a number divisible by 10 must end with only 0 (i.e B).   If B had to be 0, product should also be 0 regardless of A.   Only one answer choice meets the requirement.   Ans 50.
<result>E</result>
If A and B are digits and 5AB is a 3-digit number that is divisible by 10, which of the following is a possible product of A and C?