What is the remainder when 27^{27}-15^{27} is divided by 6?

  1. A. 0
  2. B. 1
  3. C. 3
  4. D. 4

Correct Answer: A. 0

Explanation

Since 27 \equiv 3 \pmod{6} and 15 \equiv 3 \pmod{6}, the expression becomes 3^{27} - 3^{27} \equiv 0 \pmod{6}. The remainder is 0.

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