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  1. What is the unit digit in 7105 ?

  2. A.

    1

    B.

    5

    C.

    7

    D.

    9

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    Answer : Option C

    Explanation :

    Unit digit in 7105 = Unit digit in [ (74)26 x 7 ]

    But, unit digit in (74)26 = 1

     Unit digit in 7105 = (1 x 7) = 7


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