My mother is twice as old as my brother. I am five years younger to my brother but three years older to my sister. If my sister is twelve years of age, how old is my mother?
Explanation
Correct Option - 3
My mother is twice as old as my brother.
Let the age of my brother be ‘a’ years.
So, age of my mother = 2a
I am five years younger to my brother.
So, my age = a - 5
And three years older to my sister.
So, age of my sister = (a – 5) – 3 = a - 8
If my sister is twelve years of age.
According to question,
a – 8 = 12
⇒ a = 12 + 8
⇒ a = 20
Age of my mother = 2a
= 2 × 20
= 40 years
Hence, ‘40’ is the correct answer.
