(((13!)^16)-((13!)^8))/(((13!)^8)+((13!)^4))=a
then what is the units digit for a/((13!)^4)=	Pick: A) 7 B) 8 C) 9 D) 6 E) 5
(((13!)^16)-((13!)^8))/(((13!)^8)+((13!)^4))=a   solving it , we get   a/((13!)^4)= ((13!)^4-1)   last digit of (13!)^4 will be 0.   so last digit of ((13!)^4-1) will be 9.   ANSWER:9
<result>C</result>
(((13!)^16)-((13!)^8))/(((13!)^8)+((13!)^4))=a
then what is the units digit for a/((13!)^4)=