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 old, how old is my mother?

• A. \( \text{50} \)
• B. \( \text{40} \)
• C. \( \text{30} \)
• D. \( \text{24} \)

Hint:

Age-related math problems can be solved efficiently by defining clear relationships and equations.

Answer 1

The Correct Option is B

- The sister is 12 years old. - The person is three years older than the sister: \( 12 + 3 = 15 \). - The brother is five years older than the person: \( 15 + 5 = 20 \). - The mother is twice the age of the brother: \( 20 \times 2 = 40 \). Thus, the mother’s age is 40 years.