How many digits are required to number a book containing 240 pages?  Select the correct option.
A) 756	B) 612	C) 492	D) 372	E) 250
9 pages from 1 to 9 will require 9 digits.   90 pages from 10 to 99 will require   90*2= 
<gadget id="calculator">  90*2</gadget>
<output>180</output>
180 digits.   240-(90+9)= 
<gadget id="calculator">240-(90+9)</gadget>
<output>141</output>
141 pages will require   141*3= 
<gadget id="calculator">  141*3</gadget>
<output>423</output>
423 digits.   The total number of digits is 9+180+423= 
<gadget id="calculator">9+180+423</gadget>
<output>612</output>
612.   The answer is 612.
<result>B</result>
How many digits are required to number a book containing 240 pages?