What is the unit digit in 7^105?	Choose the correct option.
A) 2  B) 3  C) 1  D) 5  E) 7
Unit digit in 7^105 = unit digit in [(7^4)^26 ]* 7   But unit digit in 7^4=1   unit digit 7^105 = 1*7= 
<gadget id="calculator">1*7</gadget>
<output>7</output>
7   Answer is 7
<result>E</result>
What is the unit digit in 7^105?