Question

My mother is three times elder than the age of my sister My father is thirty years elder to me I was five years old when my sister born If my sister is 16 years old The difference in the age of my parents is

Answer 1

Sister's age = x, Mother's age = 3x
Brother's age = $x+5$, Father's age =$x+5+30=x+35$
Now x = 16, So difference of parents age
$=(x+35)-3x=35-2x=35-2$ $\times$ $16=3$