Multiple choice

The respective ratio between the present ages of son, mother, father and grandfather is 2:7:8:12. The average age of son and mother is 27 years. What will be mother’s age after 7 years ?

  1. 42 years

  2. 45 years

  3. 49 years

  4. 52 years

  5. 56 years
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ages are 2x, 7x, 8x, 12x. Average of son and mother: (2x + 7x)/2 = 27, so 4.5x = 27 and x = 6. Mother's current age = 7 × 6 = 42. After 7 years: 42 + 7 = 49 years.

Keep practicing — related questions