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  3. 9th Class
  4. Mental Ability
  5. Mathematical Operations

9th Class Mental Ability Mathematical Operations Question Bank Mathematical Operations

  • question_answer
    \[16+4\div 2-21\times 7=21\] The above equation is incorrect. Which one out of the following interchanges would correct it?

    A)  \[\div \] and \[\times \]               

    B) + and \[\times \]            

    C)  \[-\]and\[\div \]                          

    D)  \[-\]and+

    Correct Answer: A

    Solution :

    : Given equation becomes \[16+4\times 2-21\div 7=21.\]


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