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SSC Sample Paper Mock Test-7 SSC CGL Tear-II Paper-1

  • question_answer
             If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their

    A)  12

    B)  28

    C)  80

    D)  160

    Correct Answer: D

    Solution :

    Let \[x+y=20\] and \[x-y=8\] \[\therefore \]      \[(x+y)(x-y)=20\times 8\] \[\Rightarrow \]   \[{{x}^{2}}-{{y}^{2}}=160\]


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