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    • Question

      Find remainder when 7¹³ is divided by

      100.
      A 11 Correct Answer Incorrect Answer
      B 13 Correct Answer Incorrect Answer
      C 7 Correct Answer Incorrect Answer
      D 17 Correct Answer Incorrect Answer

      Solution

      Cycle of 7 mod 100: 7¹ = 07 7² = 49 7³ = 43 7⁴ = 01 Cycle length = 4 13 mod 4 = 1 So remainder = 7¹ = 7

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