StreetCar Drama is possible

When I had heard Professor Heap telling us about the street car problem, I didn't think it was possible but it seems it is. I was reading my friend Mandy's blog and she had figured it out. The solution can be found here: http://mandyxu.blog.com/2013/02/28/streetcar-drama/


Heres the problem:
A: Haven't seen you in a long time! How old are your three kids now?
B: The product of their ages (rounded down to the nearest year) is 36.
A: That doesn't really answer my question.
B: Well, the sum of their ages is (fire engine goes by)
A: That still doesn't tell me how old they are.
B: Well, the eldest plays piano.
A: Okay, I see: their ages are (you have to get off the streetcar)

The solution is actually pretty clever and the one tip that I can give without pretty much giving the answer a away is to write out the possible combinations of numbers. It always seems that carrying out a few sample solutions helps find patterns in this course.