This is Kannada version of one of the most popular book by Dr R S Aggarwal Quantitative Aptitude. Ever since its release in 1989, Quantitative Aptitude has come to acquire a special place of respect and acceptance among students and aspirants appearing for a wide gamut of competitive exams. As a front-runner and a first choice, the book has solidly stood by the students and helped them fulfil their dreams by providing a strong understanding of the subject and even more rigorous practice of it. Now, more than a quarter of a century later, with the ever changing environment of examinations, the book too reinvents itself while being resolute to its core concept of providing the best content with easily understandable solutions. With the enhancements to an already robust book, we fulfil a long-standing demand of the readers to bring out a revised and updated edition, and sincerely hope they benefit immensely from it. Section-I: 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. Area 25. Volume and Surface Area 26. Races and Games of Skill 27. Calendar 28. Clocks 29. Stocks and Shares 30. Permutations and Combinations 31. Probability 32. True Discount 33. Banker's Discount 34. Heights and Distances 35. Odd Man Out and Series Section-II: Data Interpretation 36. Tabulation 37. Bar Graphs 38. Pie Chart 39. Line Graphs