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      Question

      Find the unit digit of (11833 - 8).

      B 4 Correct Answer Incorrect Answer
      C 6 Correct Answer Incorrect Answer
      D 2 Correct Answer Incorrect Answer

      Solution

      Cyclicity of 8 = 8, 4, 2, 6, 8 Hence, we can see the last digits repeat themselves after every power of '4'. So, unit digit of 11833 = units digit of 8(32 + 1) = 8
      {Since, (32/4) = 8} So, unit digit of 11833 - 8
      = unit digit of 8 - 8
      = 8 - 8 = 0

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