Question

how many digits are required to number the pages of a book having 100 pages​

Answer 1

Answer:

100

hope it helps you...

Answer 2

Answer:

You start with one digit, at

1

Following

9

you switch to two digits, with

10

and then it stays like that all the way until

99

then you get

100

That's it. How many of those page numbers have 1 digit? Take that number, call it “a”. How many have two digits? Take that number, “b”, multiply it by two. How many have three? Take that number, “c”, multipy it by three. Add up those three results:

(a∗1)+(b∗2)+(c∗3)=Totaldigits