Short Tricks to Solve Compound Interest Questions for IPMAT 2025

Overview: Master compound interest with our expert guide on formulas and short tricks to solve compound interest questions for IPMAT 2025. Get practical tips and strategies to solve them.

Understanding compound interest is fundamental to your school mathematics and competitive exams like the IPMAT.

Unlike simple interest, which is calculated solely on the principal amount, compound interest is calculated on the principal amount plus any interest accumulated.

Solving these is quite easy, as we have been used to doing so since school; nonetheless, solving them faster is more important during entrance exams like IPMAT.

This article outlines essential strategies and simple tricks to solve compound interest questions for IPMAT.

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Concept of Compound Interest 

Before you know Tricks to Solve Compound Interest Questions for IPMAT, it's essential to understand the concept first.

Compound interest can be visualized as "interest on interest," where the amount you earn from an investment grows because you earn interest on both the money you initially put in and the interest that has been added to that amount.

Here’s the basic formula used to calculate compound interest:

A = P{1 + R/100} nᵀ

Here T = Time
A = Amount
P = Principal
R = Rate of Interest
A = Amount = Principal + Compound Interest
N = Number of times interest is applied per period.

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Short Tricks to Solve Compound Interest Questions for IPMAT 2025

Some of the sample questions below, with their solutions, will help you learn the short tricks to solving compound interest questions for IPMAT.

Example: Calculate the difference in compound interest for 3 and 2 years.

• Principal (P) = ₹6000
• Rate of Interest (R) = 5% per annum

Calculation:

Year	Principal at Start of the Year	Interest for the Year	Total at End of Year
1	₹6000	₹300 (5% of ₹6000)	₹6300
2	₹6300	₹315 (5% of ₹6300)	₹6615
3	₹6615	₹330.75 (5% of ₹6615)	₹6945.75

Total CI for 3 years: ₹945.75 (₹300 + ₹315 + ₹330.75)
Total CI for 2 years: ₹615 (₹300 + ₹315)
Difference: ₹330.75 (Interest for the 3rd year only)

This method breaks down the compound interest year by year, allowing you to calculate or estimate CI over different periods quickly.

5 Tricks to Solve Compound Interest Questions for IPMAT 

Here are the top 5 tricks to solve compound interest questions for IPMAT,

Trick 1

Trick 2

Trick 3

Trick 4

Trick 5

These 5 Tricks to Solve Compound Interest Questions for IPMAT will help you speed up when attempting questions.

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Sample Question for Compound Interest for IPMAT 2025

Let's look at sample questions after learning the tricks to solve compound interest questions for IPMAT.

Below is the set of sample questions for you to practice:

• Question 1: If P = 10000/-, T = 2 years 6 months, rate of interest = 20% compounded annually. Find Amount?
• Question 2: If P = 20,000, Rate of Interest = 3% p.a. Time = 2 years 3 months. Find Compound interest
• Question 3: If P = 7.30 lacs, Rate of Interest = 10% p.a. T = 2 years and 2 days. Find Compound Interest?
• Question 4: If P = 18000, Rate of Interest = 16.66%, Time = 1 year 73 days.  Find Compound Interest?
• Question 5: If P = 10400, Rate of Interest = 5%, Time = 1 year and 6 weeks. Find interest compounded annually.
• Question 6: If P = 8000, Time = 3 years, Rate of Interest = 1%, 2%, and 3%. Find CI – SI =?
• Question 7: The difference between simple interest and compound interest on a certain sum of money at 5% for 2 years is Rs. 3. Find the sum.
• Question 8: If the difference between Compound interest and simple interest on a certain sum of money at 5% p.a. for 3 years is Rs. 122. Find the sum.
• Question 9: Simple interest on a sum of money for 2 years is Rs. 480, and Compound interest is Rs. 492. Find the sum and rate of interest.
• Question 10: Principal =? Time = 3 years, Rate of Interest = 15%, Compound interest – Simple interest = Rs. 1701. Find Principal value?

To strengthen your concept, try solving the previous year's questions.

Read: How to Solve IPMAT Verbal Ability Questions 2025

Preparation Tips To Solve Compound Interest Questions for IPMAT 2025

1. Understand the Formula: Make sure you're comfortable using the compound interest formula and modifying it based on the compounding frequency (annually, semi-annually, quarterly, etc.).
2. Use a Scientific Calculator: Using a scientific calculator goes hand in hand with tricks to solve compound interest questions for IPMAT to speed up your calculations for actual exams.
3. Create Shortcuts: Develop personal shortcuts and mnemonics to remember steps and formulas.
4. Practice Regularly: Regular practice with questions of varying difficulty levels can enhance speed and accuracy. Consider enrolling in Supergrads IPMAT Online Coaching to get expert guidance & practice mock test tailored for success.

Mastering the art of solving compound interest calculations quickly is crucial for success in the IPMAT.

By understanding and applying the short tricks to solve compound interest questions for IPMAT, candidates can efficiently tackle this section, saving time for more challenging problems and ultimately enhancing their overall performance in the exam.

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Key Takeaways:

• Understand the Formula: Mastery of the compound interest formula A = P x ((1)+(R/100))^(NxT) is crucial for adapting quickly to various exam problems.
• Fast Calculation Skills: Developing swift calculation methods is key for efficiently tackling time-restricted exam sections like those in IPMAT.
• Use of Technology: Proficiency with scientific calculators enhances speed and accuracy, providing an advantage during the exam.
• Diverse Practice: Consistent practice across a spectrum of problems ensures preparedness for all levels of question complexity.
• Personal Shortcuts: Creating and using personal calculation shortcuts can significantly reduce solving time and improve efficiency during the test.
• Use strategies: Apply the five tricks to solve compound interest questions for IPMAT quickly and precisely.

Read: IPMAT Maths Important Formulas