Question

The Wilsons have triplets and another child who is thirteen years old. The sum of the ages of their children is 31. How old are the triplets?

Answer 1

The age of each triplet if 6 years.

Explanation:

Let us assume the age of first child in triplet = m years

Since, the children are triplet, so age of 3 children are SAME.

⇒The age of second child in triplet = m years

and, The age of third child in triplet = m years

Also, the age of fourth children = 13 years

So, sum of age of all four children =

Sum of age of all triplets + Age of fourth child = m + m + m + 13 = 3 m + 13

Given: The sum of the ages of their children is 31.

⇒ 3 m + 13 = 31

or, 3 m = 31 -1 3 = 18

or, m = 18/3 = 6

or, m = 6 years

Hence the age of each triplet if 6 years.