Multiple choice general knowledge

How many keystrokes are needed to type numbers from 1 to 1000?

  1. 3001

  2. 2893

  3. 2704

  4. 2890
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B Correct answer
Explanation

Numbers 1-9: 9 numbers × 1 digit = 9 keystrokes. Numbers 10-99: 90 numbers × 2 digits = 180 keystrokes. Numbers 100-999: 900 numbers × 3 digits = 2700 keystrokes. Number 1000: 1 number × 4 digits = 4 keystrokes. Total = 9 + 180 + 2700 + 4 = 2893 keystrokes.

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