7th Class Mental Ability Mathematical Operations Question Bank Mathematical Operations

  • question_answer
    If \[\,'-'~\]stands for 'division','+' stands for 'multiplication',\[\,'\div '~\] stands for 'subtraction' and \[\,'\times '~\] stands for 'addition', then which one of the following equations is correct?

    A) (a) \[2\times 5\times 6+3\div 2=23\]                                 

    B) (b) \[2\times 5+6-3\div 2=\text{ }23~\]

    C) (c) \[2-5\div 6\times 3-2=23\]                              

    D) (d) \[2\div 5+6-3+2=\text{ }23~\]

    Correct Answer: A

    Solution :

    (a) : Using the proper notations in [a], we get LHS \[=2+5+6\times 3-2=2+5+18-2\text{ }=23~~\]


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