If S and T are positive integers, and the remainder obtained when S is divided by T is the same as the remainder obtained when T is divided by S, which of the following is a possible value of ST?
Choose the correct answer:
A) 64  B) 55  C) 42  D) 36  E) 24
I am not too sure on this. I guess it is possible only when S and T are both same. If they are both same, ST must be a perfect square.   64 is a perfect square.   64ns:64
<result>A</result>
If S and T are positive integers, and the remainder obtained when S is divided by T is the same as the remainder obtained when T is divided by S, which of the following is a possible value of ST?