What number is obtained by adding the units digits of 734^100 and 347^83?	Choose one:
A) 7
B) 8
C) 9
D) 10
E) 11
The units digit of 734^100 is 6 because 4 raised to the power of an even integer ends in 6.   The units digit of 347^83 is 3 because powers of 7 end in 7, 9, 3, or 1 cyclically. Since 83 is in the form 4n+3, the units digit is 3.   Then   6+3= 
<gadget id="calculator">  6+3</gadget>
<output>9</output>
9.   The answer is 9.
<result>C</result>
What number is obtained by adding the units digits of 734^100 and 347^83?