How many digits are required to number a book containing 300 pages?	Answers:
A) 792 B) 684 C) 492 D) 372 E) 340

Rationale: "9 pages from 1 to 9 will require 9 digits . 90 pages from 10 to 99 will require 90 * 2 = 180 digits . 300 - ( 90 + 9 ) = 201 pages will require 201 * 3 = 603 digits . the total number of digits is 9 + 180 + 603 = 792 . the answer is a ."
Answer: A