SOLUTION: what is the units digit of 7^15?
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Question 259577: what is the units digit of 7^15?
Found 2 solutions by Alan3354, edjones:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
3
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
7^15
There is a repetition of 7, 9, 3, 1, 7 etc for the last digit. 15/4=3 3/4 so the last digit is the third number 3 because the remainder is 3.
.
Ed
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