How many digits are required to number a book containing 250 pages? Choose the correct choice from the following.
A) 756  B) 642  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.   250-(90+9)= 
<gadget id="calculator">250-(90+9)</gadget>
<output>151</output>
151 pages will require   151*3= 
<gadget id="calculator">  151*3</gadget>
<output>453</output>
453 digits.   The total number of digits is 9+180+453= 
<gadget id="calculator">9+180+453</gadget>
<output>642</output>
642.   The answer is 642.
<result>B</result>
How many digits are required to number a book containing 250 pages?