3. Integers
4. Fractions
6. Decimals
9. Percentage
10. Profit and Loss
11. Simple Interest
12. Exponents
15. Mensuration
16. Geometry
19. Probability
20. Data Handling
20.2. Mean, Median, and Mode
20.3. Bar Graphs
20.3.1. Drawing Bar Graphs
20.3.2. Interpreting Bar Graphs
Sri Lanka