How many digits should be necessary to print a book of 835 pages?

Question

Answer 1

The book will have 9 one digit numbers, 90 two digit numbers and 736 three digit numbers.
So, total number of digits needed is 9*1 + 90*2 + 736*3 =9+180+2208 = 2397

Answer 2

The book will have 9 one digit numbers, 90 two digit numbers and 736 three digit numbers.
So, total number of digits needed is 9*1 + 90*2 + 736*3 =9+180+2208 = 2397

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How many digits should be necessary to print a book of 835 pages?