Question

4. Four sisters are 30 months apart in age. If the sum of their ages is 31 years, how old is the
youngest sister?​

Answer 1

Answer:If they are 30 months apart then their sum cannot be 31 year

Explanation:

Answer 2

Answer:

4 years

Explanation:

Let x ( in months ) be the age of youngest sister,

Since, the sisters are 30 months apart in age,

So, the age of remaining sisters are x + 30, x + 60, x + 90,

Sum of the ages = x + x + 30 + x + 60 + x + 90 = 4x + 180,

According to the question,

4x + 180 = 31 × 12  

4x + 180 = 372

4x = 192

⇒ x = 48,

Hence, the age of youngest sister = 48 months = 4 years