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Railways Sample Paper RRB (Assistant Loco Pilot) Sample Test Paper-14

  • question_answer
    The numbers 1 to 29 are written side by side as follows 1234567891011............................ 28 29 If the number is divided by 9, then what is the remainder?

    A)  3                  

    B)  1                    

    C)         0                    

    D)         None of these               

    Correct Answer: A

    Solution :

    Sum of the digits of the 'super' number \[=1+2+3+...................+29\] \[=\frac{29}{2}.\{2\times 1+(29-1).1\}\] \[=\frac{29}{2}.(2+28)=\frac{29\times 30}{2}=29\times 15=435\] Thus  \[x=7,\text{ }y=6\]


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