Question
A printer uses a total number of 4893 digits in order to
number all the pages of his book. He starts with the digit 1 for the ļ¬rst page of the book. How many pages does the book have?Solution
1.digit pages = 1 to 9 = 9 2.digits pages = 10 to 99 = 90 3.digits pages = 100 to 999 = 900 4 digit pages = letās say x Now, Number of digits used till 999 pages = 9*1 + 90*2 + 900*3 = 9 + 180 + 2700 = 2889 Therefore, 4x + 2889 = 4893 4x = 2004 X = 501 So, total pages are 9 + 90 + 900 + 501 =1500
Which of the following missile was built in India with Russian collaboration?
In which country is the Mandarin language primarily spoken?
The 'Varada Mudra' of Buddha signifies which of the following?
In 2021, which of the following airports of India has seen a growth of 17.68% in air cargo?
As per World Meteorological Organization (WMO), which of the following is the hottest year on record?
What did India Ratings & Research revise Indiaās GDP growth forecast for the current fiscal year to, up from 7.1%?
Who among the following is known as the Father of the Indian Constitution?
Which of the following are part of Current Account transaction of BoP?
Which one of the following is not the component of PMKSY
Which river flows through Paris?
Relevant for Exams:
