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