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Tyler used 2989 digits to number the pages of a book. How many pages does the book have?

I know that pages 1-9 use 1 digit, total number is 9
Pages 10-99 use 2 digits, total number is 180
Pages 100-999 use 3 digits, 900 pages= 2700
with 25 extra pages

Can you help me from here

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  1. pages 1 through 999 need 2889 digits

    pages 1000 and up use 4 digit numbers

    so 25 pages beyond 999

    last page should be 1024

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  2. Need to be explained a little more

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  3. what about if he had 192 pages?

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