the sum of ages of 5 children born 4 years different each is 70 yrs . what is the age of the elder child ?
"let the ages of children be x , ( x + 4 ) , ( x + 8 ) , ( x + 12 ) and ( x + 16 ) years . then , x + ( x + 4 ) + ( x + 8 ) + ( x + 12 ) + ( x + 16 ) = 70 5 x = 30 x = 6 x + 16 = 6 + 16 = 22 answer : c"
divide(add(add(add(add(4, const_4), add(4, const_4)), add(const_4, const_4)), 70), 5)