A printer numbers the pages of a book starting with 1 and uses 3189 digits in all. How many pages does the book have ?
A. 1000
B. 1074
C. 1075
D. 1080
Answer: Option B
Solution(By Examveda Team)
No. of digits in 1-digit page nos. = 1x9 = 9.No. of digits in 2-digit page nos. = 2 x 90 = 180.
No. of digits in 3-digit page nos. = 3 x 900 = 2700.
No. of digits in 4-digit page nos. = 3189 - (9 + 180 + 2700) = 3189 - 2889 = 300.
Therefore No. of pages with 4-digit page nos. = (300/4) = 75.
Hence, total number of pages = (999 + 75) = 1074.
Join The Discussion
Comments ( 1 )
Related Questions on Arithmetic Reasoning
A. 71 years
B. 72 years
C. 74 years
D. 77 years
A. Rs. 4, Rs. 23
B. Rs. 13, Rs. 17
C. Rs. 15, Rs. 14
D. Rs. 17, Rs. 13
A. 2/13
B. 13/40
C. Data inadequate
D. None of these
Why have you added 75 to 999,I didn't understand that please explain