Problem-specifications: Basic Concepts of Number Theory

[adarshk007]

All the practice questions will be based on Basic elementary Number Theory Concepts.
Eg:
- Chinese Remainder Theorem
- Euler Totient Function
- Prime Numbers
- Divisibility Theories.
Further, add more Interesting topics/questions based on the number theory.

[Stargator]

I would recommend the exercise is broken into multiple exercises.

One exercise that touches on Chinese Reminder Theorem. Another for Euler Totient Function, etc

Bundling them all into one exercise can be confusing for users new to one or more of those concepts.