SOLUTION: The unit digit of 197^197

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Question 976772: The unit digit of 197^197
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
It's 7.
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Only the 1's digit matters.
7^197 gives the same unit digits.
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Look at 7^n for n = 1 thru 8, notice the repetition.