laxman wanted to write first 265 natural numbers on the computer how many times he has to press the keys on the key board to do so?
Answers
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Given : laxman wanted to write first 265 natural numbers on the computer
To Find : how many times he has to press the keys on the key board
Solution:
Natural numbers starts from 1
first 265 natural numbers
1 , 2 , 3 , _______ , 264 , 265
1 to 9 are 9 numbers with 1 digit
10 to 99 are 90 numbers with 2 digits
100 to 265 are 166 numbers with 3 digits
Total Digits = 9 x 1 + 90 x 2 + 166 x 3
= 9 + 180 + 498
= 687
687 times he has to press the keys on the key board to write first 265 natural numbers on the computer
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