Top 5 Videos on Simple and Compound Interest for CAT Quantitative Aptitude by PW

Simple and Compound Interest questions in CAT Quantitative Aptitude can require you to work backwards from an amount, compare two interest values or calculate the effect of changing compounding intervals.

A question may provide the rate and time but ask for the principal, or require you to identify how interest changes when the calculation period changes. Knowing the formulas is only the starting point; you also need to recognise the conditions that determine how they should be applied.

PW’s MBA Wallah videos cover these situations through concept explanations, worked examples, shortcuts and CAT-level questions. You can learn the fundamentals of Simple Interest, understand how Compound Interest works, practise questions involving unknown values and revise annual, half-yearly and quarterly compounding. 

The following five videos offer different approaches to learning and revising the topic.

Video 1. Revise Simple and Compound Interest Together with a Complete One-Shot Lesson

This one-shot lesson brings Simple Interest and Compound Interest together for CAT Quantitative Aptitude. It starts with the basic concepts before covering calculation methods, rate changes, the relationship between Compound Interest and geometric progressions, differences between the two types of interest, rate-based questions and installments.

Worked examples, shortcuts and CAT-level questions with solutions help you apply the concepts to different problem types.

Choose this lesson if you want to cover both topics in one session or revise them before a mock test. Pay attention to how the methods differ between Simple Interest and Compound Interest, particularly when a question involves changing rates or multiple periods.

Practising the examples independently can help you select the right formula and solve questions more efficiently.

Video 2. Master Simple Interest Formulas with Shortcuts and CAT Practice

This lesson focuses on Simple Interest, explaining the relationship between Principal, Rate, Time and Amount. It covers formula-based calculations, shortcut methods and application-based CAT previous year question, along with fast calculation techniques.

The discussion of common traps and mistakes also helps you recognise errors that can affect otherwise straightforward calculations.

Use this video if you are learning Simple Interest or frequently make mistakes in direct formula-based questions. Practise identifying the principal, annual rate and time period before substituting values into a formula.

This habit can help you avoid errors and build a reliable foundation before attempting questions that combine Simple Interest with other concepts.

Video 3. Understand Simple Interest from the Basics Through Stepwise Examples

This foundation lesson explains Simple Interest as an application of Percentage and begins by comparing it with Compound Interest. It introduces Principal, annual Rate, Period, and Amount through examples before developing calculation methods using numerical questions.

Time conversion, formula application, reasoning-based approaches, and shortcuts are included to help you work through common aptitude problems.

If you are new to Simple Interest, start with this lesson before moving to more complex questions. Focus on converting the time period correctly and understanding how each value affects the calculation.

Once you are comfortable with the examples, solve similar questions independently to strengthen your concept recall and prepare for mixed interest problems.

Video 4. Solve Compound Interest Questions with Faster Calculation Methods

This lesson focuses on Compound Interest and its relationship with Simple Interest. It covers common CAT question types involving differences in interest, investment periods, interest rates, Principal and final Amount.

Shortcuts, successive percentage calculations and successive rate applications help simplify numerical problems for CAT and other MBA entrance examinations.

Choose this video if you understand the basic interest concepts but take too long to solve Compound Interest questions. Practise identifying which value is unknown and which information is available before choosing a method.

This approach can help you avoid unnecessary calculations and improve your efficiency when questions require you to find a rate, period or principal.

Video 5. Practise Different Compounding Intervals with One-Shot Revision

This foundation lesson explains the difference between Simple Interest and Compound Interest through practical applications. It covers annual, half-yearly and quarterly compounding, including the adjustments required to the rate and calculation frequency.

Amount-based methods, successive percentage calculations, equivalent-rate approaches, examples, shortcuts and practice questions help you apply these concepts to different problems.

Use this video when you need to revise compounding conditions before sectional tests, mock exams, or previous-year question practice. Pay close attention to how the rate and number of periods change when compounding occurs more than once a year.

Practising these variations can help you avoid common calculation errors and handle Compound Interest questions more confidently.

These five PW videos cover Simple and Compound Interest for CAT Quantitative Aptitude Syllabus, from basic formulas to rate changes, installments and different compounding intervals. Start with the lesson that matches your current level, practise the examples independently, and revisit questions you find difficult.

Regular practice can help you distinguish between the two interest methods, select suitable calculation techniques and solve interest-based questions more accurately during CAT mocks.