The sum of ages of 5 children born 3 years different each is 70 yrs. What is the age of the Elder child? Answers.
A) 17
B) 19
C) 16
D) 18
E) 20
Let the ages of children be x, (x + 3), (x + 6), (x + 9) and (x + 12) years.   Then, x + (x + 3) + (x + 6) + (x + 9) + (x + 12) = 70   5x = 40   x = 8.   x+12= 8+12= 
<gadget id="calculator">8+12</gadget>
<output>20</output>
20   20
<result>E</result>
The sum of ages of 5 children born 3 years different each is 70 yrs. What is the age of the Elder child?