The unit’s digit in the product (3127)^173 is:
Choose the correct choice.
A) 1
B) 3
C) 7
D) 9
E) 11
Unit digit in (3127)^173 = Unit digit in 7^173.   Now, 7^4 gives unit digit 1.   Therefore, 7^173= (74)^43 * 7^1. Thus, 7^173 gives unit digit 7.   ANSWER:7
<result>C</result>
The unit’s digit in the product (3127)^173 is: