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Railways Sample Paper RRB (Assistant Loco Pilot) Sample Test Paper-19

  • question_answer
    Three of the following four are alike in a certain way and so form a group. Which is the one that does not belong to that group?

    A)  131                  

    B)        151                            

    C)  181            

    D)                     161                

    Correct Answer: D

    Solution :

    The digit-sums are as follows: \[131\to 1+3+1=5\] \[151\to 1+5+1=7\] \[181\to 1+8+1=10\to 1+0=1\] \[171\to 1+7+1=9\] \[161\to 1+6+1=8\] Only 161 has its digit-sum even.


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