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      Question

      Find the remainder when (2100 +

      3100) is divided by 5.
      A 9 Correct Answer Incorrect Answer
      B 2 Correct Answer Incorrect Answer
      C 7 Correct Answer Incorrect Answer

      Solution

      ATQ, Modulo 5 cycles are of length 4. 24 тЙб 1 (mod 5) тЗТ 2100 = (24)25 тЙб 125 тЙб 1 34 тЙб 1 (mod 5) тЗТ 3100 = (34)25 тЙб 1 Sum тЙб 1+1 = 2 (mod 5)

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