Q. Two old friends, Jack and Bill, meet after a long time.
Jack: Hey, how are you man?
Bill: Not bad, got married and I have three kids now
Jack: That’s awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool … But I still don’t know.
Bill : My eldest kid just started taking piano lessons.
Jack: Oh now I get it.
How old are Bill’s kids ?