2. Integers

3. Fractions

4. Decimals

7. Percentage

10. Exponents

13. Mensuration

14. Geometry

17. Probability

18. Data Handling

18.2. Mean, Median, and Mode

18.2.1. Mean

18.2.2. Median

18.2.3. Mode

18.2.3.1. Mode of Ungrouped Data

18.2.3.2. Empirical Formula for Calculating Mode

18.3. Bar Graphs