3. Integers
4. Fractions
6. Decimals
7.1. Ratio
7.1.1. Terms of a Ratio
7.1.2. Equivalent Ratio
7.1.3. Ratio in the Simplest Form
7.1.5. Comparison of Ratios
7.2. Proportion
9. Percentage
10. Profit and Loss
11. Simple Interest
12. Exponents
15. Mensuration
16. Geometry
19. Probability
20. Data Handling
Germany