1. Averages, 2. Ratio, 3. Proportion, 4. Proportion, 5. Profit and Loss, 6. Simple Interest, 7. Compound Interest, 8. Annuity, 9. True Discount and Banker’s Discount, 10. Basic Concepts of Set Theory, 11. Simultaneous Equations, 12. Quadratic Equations, 13. Quadratic Equations.