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      Question

      How many figures (digits) are required to number a book

      containing 250 pages?
      A 492 Correct Answer Incorrect Answer
      B 788 Correct Answer Incorrect Answer
      C 642 Correct Answer Incorrect Answer
      D 512 Correct Answer Incorrect Answer

      Solution

        Alternate Method: Remember that digits used to write 1 to 100  = 192 digits & from 101 to 250, there are 150 numbers  & all are of 3 digits hence 450 digits are used. Hence total digits required to write 1 to 250  = 192 + 450 = 642 digits

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