Banking Quantitative Aptitude Sample Paper Quantitative Aptitude Sample Paper-25

  • question_answer
    The digit in unit's place of the number \[{{(1570)}^{2}}+{{(1571)}^{2}}+{{(1572)}^{2}}+{{(1573)}^{2}}\]is

    A) 4         

    B) 2

    C) 1                                 

    D) 3

    Correct Answer: A

    Solution :

    Unit digit of \[{{(1570)}^{2}}=0\]
    Unit digit of \[{{(1571)}^{2}}=1\]
    Unit digit of \[{{(1572)}^{2}}=4\]
    Unit digit of \[{{(1573)}^{2}}=9\]
    Required unit digit = Unit digit of
    \[(0+1+4+9)=14\]
    \[\therefore \]      Unit digit = 4


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