**Quantitative Aptitude (Quant) - Notes and Tests**

Quantitative Aptitude, also known as Quant, is a critical section in various competitive exams, especially the CAT (Common Admission Test). It assesses a candidate's numerical ability, problem-solving skills, and mathematical aptitude. To excel in this section, it is essential to have a strong foundation in quantitative concepts and practice regularly. Here, we provide comprehensive notes and tests to help you prepare for Quant effectively.

**1. Arithmetic:**
- Number Systems: Covers topics like divisibility rules, prime numbers, factors, multiples, and more.
- Percentages: Discusses the concept of percentages, calculation techniques, and applications in various scenarios.
- Profit and Loss: Focuses on concepts such as cost price, selling price, profit, loss, and related calculations.
- Simple and Compound Interest: Explains the formulas and calculations involved in simple and compound interest problems.
- Time, Speed, and Distance: Covers concepts related to time, speed, distance, and their interrelationships.
- Time and Work: Discusses problems involving work done, efficiency, and time taken to complete a task.

**2. Algebra:**
- Quadratic Equations: Covers the methods to solve quadratic equations, factorization, and the quadratic formula.
- Linear Equations: Explains the methods to solve linear equations with one or two variables.
- Inequalities: Discusses the properties and techniques to solve inequalities.
- Progressions: Covers arithmetic progressions, geometric progressions, and harmonic progressions.

**3. Geometry:**
- Lines and Angles: Covers different types of angles, parallel lines, and transversals.
- Triangles and Quadrilaterals: Discusses properties, angles, and perimeter calculations for various types of triangles and quadrilaterals.
- Circles: Explains the properties of circles, central angles, arcs, and related calculations.
- Mensuration: Covers topics like areas, volumes, surface areas, and related formulas for different shapes.

**4. Data Interpretation:**
- Tables: Focuses on interpreting and analyzing data presented in tabular form.
- Bar Graphs: Discusses the interpretation of data presented in bar graphs and related calculations.
- Pie Charts: Explains the interpretation of data presented in pie charts and calculations based on percentages.
- Line Graphs: Covers the analysis of data represented in line graphs and related calculations.

**5. Probability and Statistics:**
- Probability: Discusses the fundamental concepts of probability, including calculations of probability in different scenarios.
- Permutations and Combinations: Covers the formulas and techniques to solve problems involving permutations and combinations.
- Averages and Mixtures: Explains the concepts of averages, weighted averages, and problems related to mixtures.
- Statistics: Focuses on measures of central tendency, dispersion, and graphical representation of data.

To practice and assess your understanding of these topics, take regular tests and evaluate your performance. Practice with previous years' question papers and mock tests to get familiar with the exam pattern and time management. Remember to analyze your mistakes and work on improving your weak areas. With consistent efforts and a structured approach, you can excel in Quantitative Aptitude and increase your chances of success in competitive exams like CAT.