What is the greatest positive integer x such that 6^x is a factor of 216^10?\nOptions:\n(A) 5\n(B) 9\n(C) 10\n(D) 20\n(E) 30
Let’s work this out in a step by step way to be sure we have the right answer.
(E)
216^10 = (6^3)^10 = 6^30.

Final answer: (E)