A father said to his son, "I was as old as you are at the present at the time of your birth". If the father's age is
74 years now, what would be the son's age after thirteen years?
Let the sons current age be x
So fathers age x years back when son was born => 74-x = x
Solving we get x = 37
13 Years later son's age = 37+13 = 50 years