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11 February, 03:55

If you raise 9 to the 387th power, what is the units digit of the result

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Answers (2)
  1. 11 February, 05:41
    0
    9*9 = 81, 81*9 = 729, 729*9 = 8561, 8561 * 9 = 59049 and so on

    9^2 9^3 9^4 9^5

    So the result of each multiplication is either 1 or 9 in the units digits

    Even exponents give a 1 and odd give a 9 so 9^387 will have a units digit of

    9.
  2. 11 February, 06:38
    0
    If you rise 9 to the 387th power the correct answer is 9
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