Quantitative Aptitude (R S Aggarwal): Chapter-wise Practice Guide
Many students prepare from Quantitative Aptitude by R S Aggarwal. This page maps the common chapters to practice goals and gives original questions in a similar style. AptiCore is not affiliated with the author or publisher, and the questions here are not taken from the book.
Chapter-wise plan
| Chapter | What to practise |
|---|---|
| Number system, HCF and LCM | Divisibility rules, factors, word problems |
| Percentage, profit and loss | Successive change, discount, marked price |
| Ratio, average, mixtures | Weighted average, alligation |
| Time and work, speed and distance | Pipes, trains, boats and streams |
| Simple and compound interest | Annual and half-yearly compounding |
Original practice questions
1. Find the HCF and LCM of 24 and 36.
24 = 2³ × 3 and 36 = 2² × 3². HCF = 2² × 3 = 12. LCM = 2³ × 3² = 72.
2. Find the simple interest on ₹1,000 at 5% per annum for 2 years.
SI = (1000 × 5 × 2) ÷ 100 = ₹100.
3. Find the compound interest on ₹1,000 at 10% per annum for 2 years.
Amount = 1000 × 1.1 × 1.1 = 1210. CI = 1210 − 1000 = ₹210.
4. A shopkeeper marks an item at ₹800 and gives a 10% discount. What is the selling price?
10% of 800 = 80. Selling price = 800 − 80 = ₹720.
How to use this page
Learn the formulas on the quantitative aptitude page, solve each chapter with a timer, and test mixed sets using aptitude questions and answers.
Frequently asked questions
Is R S Aggarwal enough for placement preparation?
It covers the core maths topics well. Add timed online practice and company-specific mock tests, because placement tests are also time-pressured.
Which R S Aggarwal chapters matter most for placements?
Percentage, profit and loss, ratio, time and work, speed and distance, and interest appear most often in campus aptitude tests.