What is the units digit of 18! + 1 ?	Pick one
A) 1 B) 3 C) 5 D) 7 E) 9
Any number above 4!, such as 5!, 6!, etc... are always multiples of 10, so their units digit is 0.   The units digit of 18! + 1 is 1.   The answer is 1.
<result>A</result>
What is the units digit of 18! + 1 ?