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Railways Sample Paper RRB (Assistant Loco Pilot & Technician) Sample Test Paper-10

  • question_answer
    \[\frac{{{(165+64)}^{2}}-{{(165-64)}^{2}}}{165\times 64}=?\]

    A)  2                                

    B)  4

    C)  295                 

    D)       643

    Correct Answer: B

    Solution :

     Given exp.                   \[=\frac{{{(a+b)}^{2\,\,\,\,\,}}{{(a\,\,\,\,\,\,b)}^{2}}}{ab}=\frac{4\,ab}{ab}=4\] (where 'a \[=165,\,b=64\])'


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