in the set of positive integers from 1 to 60 , what is the sum of all the odd multiples of 5 ?
1 - 60 5 - 15 - 25 - 35 - 45 are valid multiples of 5 . add them 5 + 15 + 25 + 35 + 45 + 55 = 180 a
divide(multiply(60, multiply(const_3, 5)), 5)