How
many times a
typewritter strokes the keys to write 569 pages of book ?
Answers
Answered by
0
Answer:
Each number from 126 to 999 requires pressing three keys, and there are 1000–126 = 874 such numbers.
Each number from 1000 to 1346 requires pressing four keys, and there are 1347–1000 = 347 such numbers.
So typing all those numbers without leaving any blanks between them requires pressing 3*874+4*347 = 4010 keys.
Explanation:
Similar questions