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NTSE Sample Paper NTSE MAT Practice Test-14

  • question_answer
    The total number of digits used in numbering the pages of a book having 250 pages is

    A) 642

    B) 750

    C) 501          

    D) 943

    Correct Answer: A

    Solution :

    The number of digits used is \[\therefore \,\,9\times 1+90\times 2+151\times 3\]\[=9+180+453=642\]         


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