- 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
Express each of the following numbers as the sum of three odd primes:
(a) 21
(b) 31
(c) 53
(d) 61
To do :
We have to express the given numbers as the sum of three odd primes.
Solution :
First few odd prime numbers are 3, 5, 7, 9, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.
(a) Given number is 21.
$21=3+5+13$
21 expressed as the sum of three odd prime numbers is $3+5+13$.
(b) Given number is 31.
$31=3+5+23$
31 expressed as the sum of three odd prime numbers is $3+5+23$.
(c) Given number is 53.
$53=13+17+23$
53 expressed as the sum of three odd prime numbers is $13+17+23$.
(d) Given number is 61.
$61=7+13+41$
61 expressed as the sum of three odd prime numbers is $7+13+41$.
Advertisements