2. Integers
3. Fractions
4. Decimals
7. Percentage
10. Exponents
13. Mensuration
14. Geometry
14.1. Lines and Angles
14.1.1. Types of Angles
14.1.1.1. Complementary and Supplementary Angles
14.1.1.2. Linear Pair of Angles
14.1.1.3. Vertically Opposite Angles
14.1.1.4. Angles Around a Point
14.2. Triangles
14.3. Congruence
17. Probability
18. Data Handling