Question

How many digits are used for printing the page numbers of a book with 50 pages.a book has 250 pages how many digits have been used to print the page number of the book ​

Answer 1

So it's too simple dear

Keep patience!

Hey keep patience or I will not answer!

50 pages

So from 1 to 9 = 9 digits

From 10 to 50 it's 50 - 9 = 41 numbers with two digits each

So for two digits we used = 41*2 = 82 digits

So total we used = 82 + 9 = 91 digits

Now 250 pages

From 1 to 9 = 9 digits

From 10 to 99 = 99 - 9 numbers = 90 numbers with two digits each

So for two digits we used = 90*2 = 180 digits

Now for three digits

From 100 to 250 we have 250 - 99 numbers = 151 numbers with 3 digits each

So for 3 digits we used = 151*3 = 453 digits

So total digits we used = 453 + 180 + 9 = 642