what is the remainder of 18!/23?
Choose the correct answer: A) 1 B) 2 C) 3 D) 4 E) 5
Let rem[18!/23]=r   Wilson's Theorem says rem[(p-2)!/p]=1   rem[21!/23]=1   rem[21*20*19*18!/23]=1   rem[(-2)(-3)(-4)*r/23]=1   rem[-24r/23]=1   24r=-23K+1 ... k=-1   r=23+1/24   r=1   1NSWER:1
<result>A</result>
what is the remainder of 18!/23?