Railways Sample Paper RRB (Group D) Sample Test Paper-7

  • question_answer
    DIRECTION: In each of the following questions a number series is given with one wrong number. Find that wrong number.
    2 3 6  15 45 156.5 630

    A)  156.5  

    B)  45

    C)  15                   

    D)  6

    Correct Answer: A

    Solution :

    [a] The series is \[\begin{align}   & Rs.\left( 4x+\frac{3x}{2}+\frac{4x}{4} \right)=Rs.216 \\  & \Rightarrow \,\,\,\frac{8x+6x+4x}{4}=216 \\  & \therefore \,\,\,x=48 \\  &  \\ \end{align}\]and so on.


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