Basic Maths

Watch the video for explanation, and to practice and read editorials around these problems, use the given below links.

1. Count all digits of a number
2. Count number of odd digits in a number
3. Reverse a number
4. Palindrome number
5. Return the largest digit in a number
6. Factorial of a given number
7. Check if the number if armstrong
8. Check for perfect number
9. Check for prime number
10. Count of prime numbers till N
11. GCD of two numbers
12. LCM of two numbers
13. Divisors of a number