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What is the total number of digits you need to number the pages of a book that has 1450 pages?
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What is the total number of digits you need to number the pages of a book that has 1450 pages?

User JKirchartz
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Answer: pages 1-1,450

pages 1-9 = 9 digits

pages 10-99 = 90*2 = 180 digits

pages 100-999 = 900*3 = 2,700 digits

pages 1000-1450 = 451*4 = 1,804 digits

sum = 4,693 digits

User Joe Doherty
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