2. Integers
5. HCF and LCM
6. Fractions
8. Decimals
9. Estimation
10. Number Pattern
12. Unitary Method
13. Percentage
14. Profit and Loss
15. Simple Interest
16. Exponents
19. Mensuration
21. Geometry
21.1. Lines and Angles
21.2. Triangles
21.2.3. Properties of a Triangle
21.2.3.1. Angle Sum Property of a Triangle
21.2.3.2. Exterior Angle Property of a Triangle
21.2.3.3. Triangle Inequality
21.2.3.4. Pythagoras' Theorem
21.3. Polygon
21.4. Quadrilaterals
21.5. Congruence
24. Probability
25. Data Handling
Mexico