As you want to get the details of topics to prepare for in Aptitude for placements so here is the information of the same for you:

Section- I Arithmetical Ability

1. Numbers

2. H.C.F. & L.C.M. of Numbers

3. Decimal Fractions

4. Simplification

5. Square Roots & Cube Roots

6. Average

7. Problems on Numbers

8. Problems on Ages

9. Surds & Indices

10. Percentage

11. Profit & Loss

12. Ratio & Proportion

13. Partnership

14. Chain Rule

15. Time & work

16. Pipes & Cistern

17. Time & Distance

18. Problems on Trains

19. Boats & Streams

20. Alligation or Mixture

21. Simple Interest

22. Compound Interest

23. Logarithms

24. Area

25. Volume & Surface Areas

26. Races & Games of Skill

27. Calendar

28. Clocks

29. Stocks & Shares

30. Permutations & Combinations

31. Probability

32. True Discount

33. Banker's Discount

34. Heights & Distances

35. Odd Man Out & Series

Section- II Data Interpretation

36. Tabulation

37. Bar Graphs

38. Pie Charts

39. Line Graphs