Digital book

If it takes 852 digits to number all the pages of a book, what is the number of the last page?
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Problem



The pages of a book are numbered $1$, $2$, $3$, $\dots$ In total, it takes $852$ digits to number all the pages of the book.

What is the number of the last page?

If you liked this problem, here is an NRICH task that challenges you to use similar mathematical ideas.