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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-3

  • question_answer
    The unit digit in the product\[{{(122)}^{173}}\]is

    A)  2                                

    B)  4  

    C)  6                    

    D)         8

    Correct Answer: B

    Solution :

    \[{{2}^{1}}=2;\,\,{{2}^{2}}=4;\]             \[{{2}^{3}}=8;\,\,{{2}^{4}}=16;\,\,{{2}^{5}}=32\] \[\therefore \]Unit?s digit in the product of\[{{(122)}^{173}}\] \[=\]Units digit in\[{{(122)}^{1}}=2\] (\[1=\]remainder when \[173\] is divided by\[4\]).


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