Question

The age of a father is equal to the sum of the age of his 4 children. After 20 years, sum of the ages of the children will be twice the age of the father. What is the age of the father now?

• A. 50
• B. 40
• C. 45
• D. 48

Answer 1

Answer:

B. 40

If sum of ages of 4 children = x father's age =4x after 20 years sum of ages of children = x + 20 father's age = 4x + 20 2(x + 20) = 4x + 20 2x + 40 = 4x + 20 2x = 20 x = 10 father's father's age now = 4x = 4 × 10 = 40