Arithmetical Ability 1. Number System 2. H.C.F. and L.C.M. of Numbers 3. Decimal Fractions 4. Simplification 5. Square Roots and Cube Roots 6. Average 7. Problems on Numbers 8. Problems on Ages 9. Surds and Indices 10. Logarithms 11. Percentage 12. Profit and Loss 13. Ratio and Proportion 14. Partnership 15. Chain Rule 16. Pipes and Cisterns 17. Time and Work 18. Time and Distance 19. Boats and Streams 20. Problems on Trains 21. Alligation or Mixture 22. Simple Interest 23. Compound Interest 24.