Find the remainder when $$11^9$$​ + 7 is divided by 10.

Correct option is A

Given:
Find the remainder when $$11^9 + 7$$​ is divided by 10.
Solution: 

$$\frac{ 11^9 + 7 }{10}$$ 

$$\frac{11^9} {10} + \frac{7}{10}$$ 

$$\frac{(10+ 1)^2} {10} +\frac{7}{10}$$ 

= 1 + 7 = 8 
Remainder of given expression = 8