How many keystrokes are needed to type numbers from 1 to 1000? Choose the correct choice from the following:
A) 2704
B) 2890
C) 2893
D) 3001
E) None of these
1-9   9 digits   10-99   There are 90 2-digit numbers   (90)(2) = 180 digits   100-999   There are 900 3-digit numbers   (900)(3) = 2700 digits   1000   4 digits    9 + 180 + 2700 + 4= 
<gadget id="calculator"> 9 + 180 + 2700 + 4</gadget>
<output>2_893</output>
2893   Answer: 2893
<result>C</result>
How many keystrokes are needed to type numbers from 1 to 1000?