Question

A father tells his eldest son i am thrice as old as your youngest sister and when i was as old as you ,you were as old as youngest sister.if the youngest sister is 17 yr old,how many years ago was his elder brother born?

Answer 1

father's age=3*17=51yr
ans.17 years ago

Answer 2

It's just plain obvious, let any factor x be the period of child.

The dad's age is equivalent to children present age when the child was conceived.

So in the event that you deduct the children age ie 38-x it demonstrates the dads age when the youngster was conceived and likening to x demonstrates the kids present age so it is a substantial outcome.