I have solved this problem below. But the required answer and my answer don't match. Please help me find the mistake in my solution.
The pages of a book are numbered as 1, 2, 3, .... It is found that 195 digits are used.
(a) How many pages are numbered with a single-digit number?
(b) How many pages are numbered with a two-digit number?
(c) How many pages are there altogether?
(a) I got single-digit numbers = 9
(b) I got, two-digit numbers = 99 - 9 = 90
(c) This is the part I need verified.
The required answer is 101, I am not sure how to get there. Can you help identify my mistake. Thanks for your help.