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 first 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 = let’s 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
The Indian Ocean Rim Association (IORA) was first established in which of the following country?
Which island holds the title of being the largest in the world?
Bio-diversity is also known as
Under the India Semiconductor Mission (ISM), what was the total outlay for the Programme for Development of Semiconductors and Display Manufacturing Eco...
Who has been appointed as the chairperson of Indian National Space Promotion Authorization Centre (In-SPACe)?
With which act social security was introduced in India?
'Nilgiri Hills' are known as the _______.
Which country did India collaborate with to establish a Center of Water Technology at IIT Madras?
What is the theme for World Breastfeeding Week 2024, observed from August 1st to 7th?
The irrational number in the following options is:
Relevant for Exams:
