What is the right most non zero digit in 30^2271?
A. 7
B. 9
C. 0
D. 3
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30^2271
We can write it as
(10 *3)^2271.
The Right Most Non-Zero digit will depend on 3. So,
We have to find the Unit Digit of
3^2271.
Now.
3^(4*567 + 3)
The unit digit will be same as,
3^3 = 27.
The unit digit is 7. And 7 will the right most non-zero digit for the 30^2271.