if k ^ 3 is divisible by 120 , what is the least possible value of integer k ?
"k ^ 3 = 120 * x = 2 ^ 3 * 3 * 5 * x the factors of k must at minimum include 2 * 3 * 5 = 30 . the answer is b ."
divide(divide(120, const_2), const_2)