![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
The sum of a two digit number and the number obtained by interchanging the digits is always a multiple of option
a) 2
b) 11
c) 10
d) 12
Solution:
Let the ones place digit of the number be y and the digit in tens place be $x$.
So, the number becomes $10x + y$.
When it is reversed, new number = $10y + x$.
Now,
Sum of these two numbers.
= $10x + y + 10y + x$
= $11x + 11y$
= $11 ( x + y )$
Therefore, the answer is 11.
Advertisements