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OpenStudy (anonymous):
How many times should the keys of a keyboard be pressed in order to type the first 300 counting numbers? (i.e. to type 1, 2, 3 … 300)? A) 362 B) 1448 C) 1504 D) 792
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OpenStudy (anonymous):
1*9 + 2*(99-9) + 3*(300-99) =812
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