The sum of the ages of 5 children born at the intervals of 3 years each is 50 years. what is the age of the youngest child ?

Let x = the youngest child. Each of the other four children will then be x+3, x+6, x+9, x+12. We know that the sum of their ages is 50 . so, x+(x+3)+(x+6)+(x+9)+(x+12) = 50 inline Rightarrow x= 4 inline herefore The youngest child is 4 years old.