the sum of the ages of 5 children born at the intervals of 4 years each is 50 years . what is the age of the eldest child ?
"explanation : let x = the youngest child . each of the other four children will then be x + 4 , x + 8 , x + 12 , x + 16 . we know that the sum of their ages is 50 . so , x + ( x + 4 ) + ( x + 8 ) + ( x + 12 ) + ( x + 16 ) = 50 x = 2 the youngest child is 2 years old . age of eldest child is = 2 + 16 = 18 answer : c"
divide(subtract(divide(50, divide(5, 4)), multiply(subtract(5, const_1), 4)), 4)