How many keystrokes are needed to type the numbers from 1 to 100? Choose the correct choice from the following answers:  A) 102  B) 150  C) 192  D) 208  E) 225
There are 9 one-digit numbers from 1 to 9.   There are 90 two-digit numbers from 10 to 99.   We need 3 keystrokes for the number 100.   9 + 90(2) + 3 = 192   The answer is 192.
<result>C</result>
How many keystrokes are needed to type the numbers from 1 to 100?