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Railways Sample Paper RRB (Group D) Sample Test Paper-12

  • question_answer
    If \[63-30=30,\,\,72-10=40,\]then\[81-60=?\]

    A)  50                   

    B)  35

    C)  15                   

    D)  20

    Correct Answer: C

    Solution :

    [c] \[(6+3)-(3+0)=6\times 5=30\] \[(7+2)-\,(1+0)=8\times 5=40\] \[\therefore (8+1)-\,(6+0)=3\times 5=15\]


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