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To write all the page numbers of a book, exactly 136 times digit 1 has been used. Find the number of pages in the book.

A. 190

B. 195

C. 210

D. 220

Answer: Option B

Solution(By Examveda Team)

From 1- 99 digit 1 is used 20 times. And From 100 - 199, 1 is used 120 times
So, from 1 to 199, 1 is used,
20 + 120 = 140 times
We need 136.So leave 199, 198, 197 and 196
Required pages = 195

This Question Belongs to Arithmetic Ability >> Number System

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Comments ( 1 )

  1. D NEERAJ
    D NEERAJ :
    4 years ago

    I did not get that , can anyone please expalain it more easily?

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