12th Class Mental Ability Coding-Decoding Question Bank Question - Mathematical Operation

  • question_answer
    Directions: The two expression on either side of the sign (=) will have the same value if two terms on either side or on the same side are interchanged. The correct terms to be inter-changed have been given as one of the four alternatives under each expressions. Find the correct alternative. \[\mathbf{8}\,\,\mathbf{\div }\,\,\mathbf{2}\,\,\mathbf{\times }\,\,\mathbf{5}\,\,\mathbf{-}\,\,\mathbf{11}\,\,\mathbf{+}\,\,\mathbf{9}\,\,\mathbf{=}\,\,\mathbf{6}\,\,\mathbf{\times }\,\,\mathbf{2}\,\,\mathbf{-}\,\,\mathbf{5}\,\,\mathbf{+}\,\,\mathbf{4}\,\,\mathbf{\div }\,\,\mathbf{2}\]

    A) 5, 9

    B) 8, 5

    C) 9, 6

    D) 11, 5

    Correct Answer: C

    Solution :

    (c) In this statement interchanging 9 and 6, we get \[8\,\,\div \,\,2\text{ }\times \text{ }5\,\,-\,\,11\text{ }+\text{ }6\text{ }=\text{ }9\text{ }\times \text{ }2\,\,-\,\,5\,\,+\,\,4\,\,\div \,\,2\] \[4\,\,\times \,\,5-11+6\,\,=\,\,18\,\,-\,\,5\,\,+\,\,2\] Or \[15\,\,=\,\,15\] which is true.


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