The typing

Algebra Level 2

If we start typing numbers from 1 to 1000 in a typewriter , then how many key strokes are required to type the numbers, all from 1 -1000.


The answer is 2893.

Shreyas Shastry by shreyas shastry , 22, India

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2 solutions

Shreyas Shastry
Apr 5, 2014

To type the numbers ,

1-9 we need 1x9 =9 strokes

10-99 we need 90x2= 180 strokes

100-999 we need 900x3= 2700 strokes

so finally to type 1000 we need 4 strokes

so total number of strokes is 9+180+2700+4=2893

so the answer is 2893

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Moshiur Mission
Apr 19, 2014

9 1=9 90 2=180 900 3=2700 1 4=4 total 2893

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