If 12!/3^x is an integer, what is the greatest possible value of x?	Pick:
A) 3	B) 4	C) 5	D) 6	E) 7

Rationale: "this question is asking how many power of 3 exists in 12 ! easiest way is to identify factor of three 12 - > 4 * 3 = > 1 power of 3 9 - > 3 * 3 = > 2 power of 3 6 - > 2 * 3 = > 1 power of 3 3 - > 1 * 3 = > 1 power of 3 total equal 5 answer : c"
Answer: C