An Algebraic Challenge -- Part 4
Before looking at the question, please read the instruction carefully.
INSTRUCTION: The below given question is just for self analysis of how much time you take to solve it. If you can solve the question WITHIN 28 SECONDS after reading the QUESTION, then, you are exceptional (according to me).
QUESTION: A says to B,"I am three times old as you were when I was as old as you are." The sum of their present ages is 64 years. What is the difference of their present ages (in years)?