Question

My mother is twice as old as my brother. I am five years younger than my brother but

three years older than my sister. If my sister is twelve years of age, how old is my mother?

Answer 1

Let brother's age be "x"
Mother's age =2x
My age =x-5
Sister's age =x-5-3
=x-8
Given,
Sister's age = 12
x-8=12
X=12+8
X=20
Mother's age =2x
=2(20)
=40