Question

The Number of Pages of a book Require 1152 digits while writing then how many total number of pages are in the book? Explain How​

Answer 1

Answer:

999 pages

Step-by-step explanation:

999 pages required (1–999page)

Explanation —-

1 to 9 page required— 9 digits

10 to 99 pages required ——

2*90=180 digits( 99–10+1 =90 to calculate number of pages between 10 to 99)

And then multiply by 2 becoz each 2 digit number required 2 digit from 0 to 9.

100 to 999 pages required ——

3*900=2700 digits

So, 9+2*90+3*900=2889.

—-———————————-

To calculate total number between given range trick is simply minus bigger number by smaller one then add 1.

Ex— total number between 1 to 6 is 6

6–1+1=6

Ex— total number between 7 to 99 is 93.

99–7+1=93.

Hope you understand.

If don't understand do some effort and think by takings small examples

Like —- 11 digits are required for numbering pages from 1 to 10

9 +1*2=11