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. If \[\mathbf{A}\,\,+\,\,\mathbf{B}\,\,=\,\,\mathbf{C}\,\,+\,\,\mathbf{D}\] and \[\mathbf{A}\,\,+\,\,\mathbf{D}\,\,>\,\,\mathbf{B}\,\,+\,\,\mathbf{C}\], then which one of the following is definitely wrong?

    A) \[A\,\,>\,\,B\]

    B) \[A\,\,>\,\,C\]

    C) \[C\,\,>\,\,D\]

    D) \[B\,\,>\,\,D\]

    Correct Answer: D

    Solution :

    (d) Given: \[A\,\,+\,\,B\,\,=\,\,C\,\,+\,\,D\] \[A\,\,-\,\,D\,\,=\,\,C\,\,-\,\,B\]                   ... (i) And \[A+\text{ }D>\text{ }B+C\]          ... (ii) Subtraction (i) from (ii), we get: \[2D\,\,>\,\,2B\,\,or\,\,D\,\,>\,\,B\]. Hence, \[B\text{ }>\text{ }D\] is a wrong statement


You need to login to perform this action.
You will be redirected in 3 sec spinner