2. Integers
3. Fractions
4. Decimals
7. Percentage
10. Exponents
13. Mensuration
14. Geometry
15.1. Linear Symmetry
15.2. Rotational Symmetry
15.2.1. Rotational Symmetry in Figures
15.2.3. Rotational Symmetry in Alphabets
17. Probability
18. Data Handling