Question

A father is 9 times as old as his son and the mother is 8 times as old as the son. Sum of father's and mother's age is 51. What is the age of sun?

Answer 1

Answer:

The son must be 3 years old.

Answer 2

let the age of son be = x

the age of father is 9 times of son = 9x

the age of mother is 8 times of son = 8x

sum of father and mother age is 51 so the equation will be,

9x + 8x = 51

17x = 51

x = 51/17

x = 3

so the age of son is 3 years old