Question

The total number of digits used in numbering the pages of a book having 350 pages is

Answer 1

Answer:

Step-by-step explanation:

do AP for n terms in 3cases

FOR for 1 digit no , 2 digit no till 99 and and 3 digit no till 350 and add all of them .

You will get an1 +an2+an3 is answer . I gave you hint only .try it with help of arthematic progression