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Railways Sample Paper RRB (Group D) Sample Test Paper-4

  • question_answer
    DIRECTION: Select the missing number from the given responses. \[\begin{matrix}    81 & 64 & 16  \\    4 & 9 & 49  \\    36 & 16 & 25  \\    108 & 96 & ?  \\ \end{matrix}\]

    A)  230                 

    B)  140

    C)  120                 

    D)  410

    Correct Answer: B

    Solution :

    [b] First Column \[\sqrt{81}\times \sqrt{4}\times \sqrt{36}\] \[\Rightarrow \,\,\,9\times 2\times 6=108\] Second Column \[\sqrt{64}\times \sqrt{9}\times \sqrt{16}\] \[\Rightarrow \,\,\,8\times 3\times 4=96\] Third column \[\sqrt{64}\times \sqrt{49}\times \sqrt{25}\] \[\Rightarrow \,\,\,4\times 7\times 5=[140]\]


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