Question

How many digits requiredtobumber a book containing 200 pages?

Answer 1

From my point of view, the logic behind it is:

As the book contain 200 pages, so we need 1 to 200 numbers to number the book page by page.

In 1 to 200 numbers , we need to calculate no. of digits in these numbers.

For that,

Here,

1 digit numbers are 9,

2 digit numbers are 90,

3 digit numbers are 101.

So now,

=1*9+2*90+3*101

=492

Hope it helps you!!!!!

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Answer 2

Answer:

There are 200 pages in this book.