If n is the smallest positive integer for which 2^n is a factor of 10!, then n =?	Choose one.
A) 2	B) 4	C) 6	D) 8	E) 10
10! = 3628800   A. 2^2 = 4 (3628800/4) - this is a factor of 10!   2 is answer
<result>A</result>
If n is the smallest positive integer for which 2^n is a factor of 10!, then n =?