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 = 195Join The Discussion
Comments ( 1 )
Related Questions on Number System
Three numbers are in ratio 1 : 2 : 3 and HCF is 12. The numbers are:
A. 12, 24, 36
B. 11, 22, 33
C. 12, 24, 32
D. 5, 10, 15
I did not get that , can anyone please expalain it more easily?