What is the greatest power that 2 can be raised to so that the resulting number is a factor of 20!? Choose the most appropriate option.
A) 4
B) 8
C) 10
D) 20
E) 15
the number of 2s in 20!= 20/2=10..   ans 10
<result>C</result>
What is the greatest power that 2 can be raised to so that the resulting number is a factor of 20!?