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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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