If 15!/3^x is an integer, what is the greatest possible value of x?	Choose the most appropriate option.
A) 3  B) 4  C) 5  D) 6  E) 7
15 - 5*3   12 - 4*3   9 - 3*3   6 - 2*3   3 - 1*3   Hence max of 3^6 is allowed. IMO 6.
<result>D</result>
If 15!/3^x is an integer, what is the greatest possible value of x?