I hope those brains aren’t overworked because I have another challenge for you:
A book has 500 pages, numbered 1, 2, 3 and so on.
How many times does the digit 1 appear in the page number?

I hope those brains aren’t overworked because I have another challenge for you:
A book has 500 pages, numbered 1, 2, 3 and so on.
How many times does the digit 1 appear in the page number?
