What is the greatest positive integer x such that 6^x is a factor of 216^10?  Choose the correct answer:	A) 5	B) 9	C) 10	D) 20	E) 30
216^10 = (6^3)^10 = 6^30   ANSW30R:30
<result>E</result>
What is the greatest positive integer x such that 6^x is a factor of 216^10?