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KVPY Sample Paper KVPY Stream-SX Model Paper-30

  • question_answer
    Find the unit digit of \[({{7}^{95}}-{{3}^{58}})\].

    A) 6

    B) 4               

    C) 3

    D) None of these

    Correct Answer: B

    Solution :

    Unit digit of \[{{7}^{95}}\]= unit digit of \[{{7}^{3}}=3\]
    Unit digit of \[{{3}^{58}}\]= unit digit of \[{{3}^{2}}=9\]
    Hence unit digit of \[({{7}^{95}}-{{3}^{58}})=(13-9)=4\]


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