If n = 8^8 – 7, what is the units digit of n?  Choose the correct answer.
A) 0 B) 1 C) 2 D) 7 E) 4
8 ^ 8 - 8 = 8 (8 ^ 7 - 1)   ==&gt; 8 (2 ^ 21 - 1)   Last digit of 2 ^ 21 is 2 based on what explanation LiveStronger is saying. 2 ^ 24 - 1 yields   2 - 1= 
<gadget id="calculator">  2 - 1</gadget>
<output>1</output>
1 as the unit digit. Now on multiply this with 7, we get unit digit as 7   Answer : 7
<result>D</result>
If n = 8^8 – 7, what is the units digit of n?