Simple & Compound Interest Questions for SBI PO, Get Most Asked Question PDF

One of the most important topics in the Quantitative Aptitude section of the SBI PO Prelims and Mains is Simple Interest (SI) and Compound Interest (CI). Every year, multiple questions are asked on this topic, testing a candidate’s understanding of interest calculations, concept clarity, and speed of solving. In this article, we are providing an in-depth exploration of Simple and Compound Interest, tailored specifically for SBI PO aspirants, including the most asked questions along with the key concepts, formulas, shortcuts, and a compilation. Candidates can download the SI and CI questions PDF in the article below.

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What is Simple and Compound Interest

Simple Interest

Simple Interest is calculated on the original principal amount for the entire duration of the loan or investment. The formula for calculating Simple Interest is:

Where:

• P = Principal (initial amount of money)
• R = Rate of interest per annum
• T = Time period (in years)

Compound Interest

Compound interest is calculated on the principal amount and the interest that accumulates over time. This means that the interest earned each period is added to the principal amount, and interest is calculated on this new amount.

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Most Asked Questions for SBI PO PDF Link 

Below is a sample of the most frequently asked SI and CI questions in PDF format with a detailed solution. Candidates can click the PDF link to boost their score in the quant section.

Question 1: Kausalya divided Rs. 8800 among his four sons Ram, Lakshman, Bharat, and Shatrughan such that simple interest obtained on investing the amount received by them at the rate of 8% per annum for 1 year, 2 years, 3 years, and 4 years, respectively is the same. What is the difference between the amount received by Ram and Bharat?

A) Rs. 8808

B) Rs. 1712

C) Rs. 2816

D) Rs. 2520

E) Rs. 2750

Question 2: Amit invested equal amounts in two different schemes A and B. Scheme A is offering simple interest at the rate of 20% per annum and scheme B is offering interest at the rate of 20% compounded annually. If the difference between the interest obtained from two schemes after 2 years is Rs. 420, then find the amount invested by Amit.

A) Rs. 7500

B) Rs. 10500

C) Rs. 12500

D) Rs. 15500

E) None of these

Question 3: Bharat lent some amount at 20% per annum compound interest while Mohan lent some amount at 16% per annum simple interest. If the ratio of the amount lent by Bharat and Mohan was 10:11, respectively, then find the ratio of interest earned by Mohan and Bharat in 2 years.

A) 6:7

B) 2:3

C) 4:3

D) 4:5

E) None of these

Question 4: Mrs. Singh invested Rs. 35,000 in scheme A offering 10% compound interest for three years compounded annually. She then invested the total amount she received from scheme A in another scheme offering 8% simple interest for five years. Find the total interest earned by her after eight years.

A) Rs. 30,219

B) Rs. 28,108

C) Rs. 35,585

D) Rs. 24,634

E) None of these

Question 5: Dinesh invested Rs. ‘x’ in scheme offering 12% simple interest for three years. Rohit invested Rs. ‘x + 3000’ in a scheme offering 10% compound interest for three years. Find the value of ‘x’ if the interest earned by Rohit is Rs. 761 more than the interest earned by Dinesh.

A) Rs. 9,000

B) Rs. 6,000

C) Rs. 12,000

D) Rs. 8,000

E) None of these

Simple & Compound Interest Important Questions PDF Link

Shortcuts and Tips to solve Simple & Compound Interest Questions

1. Memorise Key Formulas: Ensure you know the SI and CI formulas, including variations for different compounding frequencies.
2. Use Difference Shortcut: For 2-year SI vs. CI questions, the difference formula (P × (R/100)^2) saves time.
3. Approximation for CI: For small rates, CI ≈ SI + (P × (R/100)^2 × T/2). This is useful for quick estimates.
4. Practice Percentage Squares: Memorise squares of common percentages (e.g., (10/100)^2 = 0.01) for faster calculations.
5. Time Management: In Prelims, aim to solve SI/CI questions in 1–2 minutes. In Mains, allocate 2–3 minutes for complex DI-based questions.
6. Mock Tests: Regularly practice with mock tests from platforms like PracticeMock or Oliveboard to simulate exam conditions.

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SBI PO Previous Year Paper (2019- 2024 Paper)

The SBI PO Previous Year Papers (2019-2024) are valuable resources for candidates preparing for the upcoming exam. These papers help aspirants understand the exam pattern, question trends, and difficulty levels of each section.

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How to Master SI & CI for SBI PO 2025?

Step-by-Step Strategy:

1. Concept Clarity First:
   Start with understanding basic definitions and formulas.
   
2. Practice Formula-Based Questions:
   Begin with direct formula applications to gain speed.
   
3. Solve SBI PO Previous Year Questions:
   Analyse the pattern and difficulty level.
   
4. Revise Short Tricks & Tables:
   Keep a chart of percentage to fraction conversions.
   
5. Time-Bound Practice:
   Set a timer for 20–25 minutes and solve 10 questions.
   
6. Mock Tests & Sectional Tests: Take mock tests and focus on improving accuracy and timing in arithmetic.

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