![Trending Articles on Technical and Non Technical topics](/images/trending_categories.jpeg)
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How many 6 digits numbers are there in all
To do: Find how many 6 digit numbers are there
Solution:
The least six-digit number = $100,000$
The greatest 6-digit number = $999,999$
We can consider it as an arithmetic progression , first term : $a= 100,000$
Last term = $999,999$
Common difference : $d = 1$
Formula for nth term = $a+ (n-1)d$
$999,999 = a+ (n-1)d$
$999,999 = 100,000 + (n-1)$
$n = 900,000 $
So, there are 9,00,000 six digit numbers.
Advertisements