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Railways R.R.C. (Kolkata) Solved Paper Held on 17-11-2013

  • question_answer
    How many digits are required for numbring the pages of a book having 300 pages?

    A) 299                              

    B) 492

    C) 789                              

    D) 792

    Correct Answer: D

    Solution :

    \[~1-9=9\]digits \[10-99=90\times 2\] = 180 digits \[100-300=201\times ~3\] = 603 digits Required number of digits are = 792


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