3. Estimation
6. HCF and LCM
7. Integers
8. Fractions
10. Decimals
12. Unitary Method
13. Percentage
14. Profit and Loss
15. Simple Interest
16. Exponents
19. Mensuration
20. Geometry
21.1. Linear Symmetry
21.2. Rotational Symmetry
21.2.1. Rotational Symmetry in Figures
21.2.3. Rotational Symmetry in Alphabets
23. Probability
24. Data Handling
Mexico