- Tests of Divisibility of Number Divisible by 2,3
- Problem-Tests of Divisibility of Number Divisible by 2,3
- Problem-Tests of Divisibility of Number Divisible by 4,5
- Tests of Divisibility of Number Divisible by 4,5
- Test of Divisibility of Number Divisible by 6
- Problem-Test of Divisibility of Number Divisible by 6
- Tests of Divisibility of Number Divisible by 8,9
- Problem-Tests of Divisibility of Number Divisible by 8,9
- Problem-Tests of Divisibility of Number Divisible by 10,11
- Tests of Divisibility of Number Divisible by 10,11
- Problem-Tests of Divisibility of Number Divisible by 12,15
- Tests of Divisibility of Number Divisible by 12,15
- Tests of Divisibility of Number Divisible by 25
- Problem-Tests of Divisibility of Number Divisible by 25

- Highest Common Factor (HCF)
- Problem-Highest Common Factors ( HCF )
- Finding HCF By Prime Factorization Method
- Problem-Finding HCF By Prime Factorization Method
- Finding HCF By Using Division Method
- Problem-Finding HCF By Using Division Method

- Least Common Multiple (LCM)
- Problem-LCM by Prime Factorization Method
- LCM by Short Division Method
- Problem-LCM by Short Division Method