4. Integers

5.1.1. Finding Factors of a Number

5.1.5. Types of Numbers

5.1.5.1. Odd and Even Numbers

5.1.5.2. Prime and Composite Numbers

5.1.5.3. Twin Primes

5.1.5.4. Prime Triplet

5.1.6. Co-Primes

5.1.7. Perfect Numbers

5.4. HCF and LCM

6. Fractions

7. Decimals

10. Unitary Method

13. Mensuration

14. Geometry

16. Linear Symmetry

17. Data Handling