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keystrokes

by sanju09 » Tue Feb 24, 2009 4:55 am
How many keystrokes are needed to type numbers from 1 to 1000?

A. 3001
B. 2893
C. 2704
D. 2890
E. None of these
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by willbeatthegmat » Tue Feb 24, 2009 5:16 am
Ans b 2893

num keystrokes
1-9 9
10-99 90*2 =180
100-999 900 *3= 2700
1000 4

Total 2893
Last edited by willbeatthegmat on Tue Feb 24, 2009 5:17 am, edited 1 time in total.
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Re: keystrokes

by sureshbala » Tue Feb 24, 2009 5:16 am
sanju09 wrote:How many keystrokes are needed to type numbers from 1 to 1000?

A. 3001
B. 2893
C. 2704
D. 2890
E. None of these[/quote

Single digit numbers 1 to 9 = 9 strokes
Two digit numebrs 10-99 = 90x2 = 180 strokes
Three digit numbers 100-999 = 900x3 = 2700 strokes
Four digit numbers 1000 = 1x4 = 4 strokes

Hence total number of strokes = 2893
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