P numbered consecutively the pgs of a book,bgning with 1 on the first pg, in numbering the pgs, total 189digit?

what is the number of pages in the book?


could you please give me a detail solution of this maths problem? thank youP numbered consecutively the pgs of a book,bgning with 1 on the first pg, in numbering the pgs, total 189digit?
Oh, its 99, becuase you have


9+(9*10*2) digits = 189 digits.