Including 71274

We used 1533 digits to number the rough book. How many pages does this book have if each page, including page 1, is numbered?

Correct answer:

x =  547

Step-by-step explanation:

n=1533  c1=9 c2=90 c3=(n1 c12 c2)/3=(15331 92 90)/3=448  x=c1+c2+c3=9+90+448=547

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