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10th Class Mental Ability Mathematical Operations Question Bank Mathematical Operations

  • question_answer
    If  '+ and \['-'\] are interchanged and '4' and '8' are interchanged, then which of the following is correct?

    A)  \[4+6-3+9=-4\]           

    B)  \[8+8-4-4=8\]

    C) \[~9+7+6-4=6\text{ }~\]  

    D)  \[4\div 8-4+8=6\]

    Correct Answer: D

    Solution :

     [a] \[8-6+3-9=8\Rightarrow -4\ne 8\] [b] \[4-4+8+8=4\Rightarrow 16\ne 4\] [c] \[9-7-6+8=6\Rightarrow 4\ne 6\] [d] \[8\div 4+8-4=6\Rightarrow 6=6.\]


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