the sum of ages of 4 children born 2 years different each is 36 years . what is the age of the elder child ?
"let the ages of children be x , ( x + 2 ) , ( x + 4 ) , ( x + 6 ) years . then , x + ( x + 2 ) + ( x + 4 ) + ( x + 6 ) = 36 4 x = 24 x = 6 . x + 6 = 6 + 6 = 12 answer : d"
divide(add(add(add(add(2, const_4), add(2, const_4)), add(const_4, const_4)), 36), 4)