What is the total number of digits printed, if a book containing 150 pages is to be numbered from 1 to 150 ?
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Correct Answer: Option B
Explanation:
From 1 to 9 there are 9 digits (only one digit) from 10 to 99 there are 180 digits ( 90 one digit \(+\) 90 two digits) from 100 to 150 there \(15 B\) digits (51 one digit \(+51\) two digits \(+51\) three digits). Therefore the total number of digits \(=9+180+153\) \(=342\)
From 1 to 9 there are 9 digits (only one digit) from 10 to 99 there are 180 digits ( 90 one digit \(+\) 90 two digits) from 100 to 150 there \(15 B\) digits (51 one digit \(+51\) two digits \(+51\) three digits). Therefore the total number of digits \(=9+180+153\) \(=342\)