How many figures (digits) are required to number a book containing 200 pages?

Number of one digit pages from
1 to 9 = 9
Number of two digit pages from
10 to 99 = 90
Number of three digit pages from
100 to 200 = 101
∴ Total number of required figures
= 9 x 1 + 90 x 2 + 101 x 3 = 492