What is the units digit of (63^4)(41^7)(99^9)? Pick.
A) 5	B) 6	C) 7	D) 8	E) 9
The units digit of 63^4 is the units digit of 3^4 which is 1.   The units digit of 41^7 is the units digit of 1^7 which is 1.   The units digit of 99^9 is the units digit of 9^9 which is 9.   Note the pattern: 9^1 = 9, 9^2 = 81, 9^3 = 729,...   The units digit alternates between 9 and 1.   The units digit of 1*1*9 is 9.   The answer is 9.
<result>E</result>
What is the units digit of (63^4)(41^7)(99^9)?