Question

Five years ago ,I was 1/3 as old as my elder sister, but now I am half her age. Therefore my present age is :

A) 22 B)20 C)24. D)26

Answer 1

Let the present age of me is x
and present age of my elder sister is 2x.

Five years ago;

my age is x-5
sister age is 2x-5

By given condition
x-5=1/3(2x-5)
x-5=2x/3 - 5/3
2x/3 -x = 5/3 - 5
(2x-3x)/3 = (5-15)/3

-x = -10

x = 10
present age of me is 10
and present age of sister is 20.