Top140 Simple Interest Questions For 100% Free [Effective]

Welcome to this guide on simple interest questions. For many, the topic of interest can be confusing, especially when diving into the world of finance. If you’ve ever wondered about simple interest questions or how to work with simple interest problems, you’re in the right place.

We frequently come across the word “interest” in our daily lives, especially when talking about money. There are different types of interests, with simple interest and compound interest being the most common. Through this article, we’ll be focusing extensively on simple interest questions and simple interest problems.

For those who prefer understanding in their native language, we’ve got simple interest questions in Hindi and the simple interest formula in Hindi. Our goal is to make simple interest in Hindi understandable for everyone.

But, what exactly is the simple interest formula? It’s a method used to figure out how much interest you’ll earn or owe over a period of time. The formula is straightforward: SI = PTR/100, where P is the Principal amount, T is the Time (in years), and R is the Interest rate.

Moreover, it’s essential to know that simple interest questions and simple interest and compound interest questions often appear in competitive exams. Whether it’s SSC, SBI, Railways, or any other state exams, mastering simple interest and compound interest questions can give you an edge. If you have a clear concept of ratio and percentage, you’ll find that tackling simple interest questions becomes much more manageable.

So, let’s dive deeper into simple interest questions and help you master the topic, whether in English or simple interest in Hindi. Happy learning!

Top140 Simple Interest Questions

11. The amount of Rs. 7,200 is invested at the normal interest rate of 11% per annum, if half of the amount received after 5 years is invested in the stock market then find the savings (in rupees).

7,200 रुपये की राशि को 11% प्रति वर्ष की साधारण ब्याज दर पर निवेश किया जाता है, यदि 5 वर्ष के बाद प्राप्त राशि का आधा शेयर बाजार में निवेश किया जाता है, तो बचत (रुपये में) ज्ञात कीजिए।


Option”A” is correct

P = Rs. 7200, r = 11% and t = 5 years.

As we know,

SI = (Prt/100)

⇒ SI = (7200 × 11 × 5)/100

⇒ SI = Rs. 3960

Total amount = 7200 + 3960 =  Rs. 11160

∴ Remaining amount = 11160/2 = Rs. 5580

12. Simple interest is 36% less than the sum. What is the rate of interest if time and rate of interest is equal?

साधारण ब्याज राशि से 36% कम है। यदि समय और ब्याज दर समान है, तो ब्याज दर क्या है?


Option”B” is correct

Let Principal be 100x, then

SI = 100x × (64/100) = 64x

Let t = r

64x = (100x × r × r)/100

⇒ r2 = 64

⇒ r = √64

⇒ r = 8

∴ Rate of interest is 8%.

13. A sum of Rs. 9800 gives simple interest of Rs. 4704 in 6 years. What will be the rate of interest per annum?

9800 रु. से 6 वर्षों में 4704 रु. साधारण ब्याज प्राप्त होता है। प्रति वर्ष ब्याज की दर क्या है?


Option”C” is correct

4704 = 9800 × R × 6/100

⇒ R = 4704/588

∴ R = 8%

14. A sum of ₹ 4200 becomes ₹ 5082 in 3 years at a simple interest. What is the rate of interest per annum?

4200 रुपए की एक राशि 3 वर्षों में साधारण ब्याज पर 5082 हो जाती है। वार्षिक ब्याज की दर क्या है?


Option”D” is correct

Let the rate of interest be r

(5082 – 4200) = 4200 × r × 3 / 100

⇒ 882 = 126r

⇒ r = 7

∴ Rate of interest per annum = 7%

15.Simple interest obtained on a sum of Rs. 3000 in 2 years is Rs. 120 more than the simple interest obtained on a sum of Rs. 2500 at same rate and time duration. Find the rate of interest.

2 वर्षों में 3000 रुपये की राशि पर प्राप्त साधारण ब्याज, समान दर और समान समय अवधि में 2500 रुपये की राशि पर प्राप्त साधारण ब्याज से 120 रुपये अधिक है। ब्याज की दर ज्ञात कीजिए।


Option”B” is correct

(3000 × 2 × R)/100 – (2500 × 2 × R)/100 = 120

⇒ 60R – 50R = 120

⇒ R = 12

∴ Rate of interest = 12%

16. A sum becomes three times of itself in 10 years at the rate of simple interest. What is the rate of interest per annum?

एक धनराशि साधारण ब्याज की दर से 10 वर्षों में स्वयं का तीन गुना हो जाती है। प्रति वर्ष ब्याज की दर क्या है?


Option”B” is correct

Here A = 3P

⇒ 3P = P + ((P × 10 × R)/100)

⇒ 3P = P (1 + (10 × R)/100)

⇒ 300 = 100 + 10R

⇒ 10R = 200

⇒ R = 20%

∴ The rate of interest per annum is 20%.

17.Rs.1500 is invested in two parts such that if one part is invested at 6% and the other at 5%, the total interest in one year from both investments is Rs. 85. How much is invested at 5%?

1500 रुपये का दो भागों में इस प्रकार से निवेश किया जाता है कि यदि एक भाग 6% और दूसरा 5% पर निवेश किया जाता है, तो दोनों निवेशों से एक वर्ष में कुल ब्याज 85 रुपये प्राप्त होता है। 5% पर कितना निवेश किया जाता है?


Option”C” is correct

Let First part be x 

So, Second part = 1,500 – x 

Simple interest on first part = (P × R × T)/199

⇒ (x × 6 × 1)/100 

⇒ 3x/50

Simple interest on Second part = ((1500 – x) × 5 × 1)/100

⇒ (1500 – x)/20

Total S.I after one year = 85 

⇒ (3x/50) + (1500 – x)/20 = 85

⇒ x = 1000

Second part = 1,500 – 1000 = 500

∴ Money invested at 5% is Rs. 500

18. If the sum of money becomes three times its self after 12 years. Then find the rate of Interest of the sum.

यदि 12 वर्षों के बाद एक राशि स्वयं की तीन गुना हो जाती है। तो राशि की ब्याज दर ज्ञात कीजिए।


Option”A” is correct

⇒ Let sum of money be 100 Rs.

⇒ Amount = 3 × 100 = 300 

⇒ S.I = 300 – 100 = 200 

⇒ Rate = ( 200 × 100 )/( 100 × 12 ) = 200/12

⇒ Rate = 200/12 = 50/3 = 16.66%

∴ Rate = 16.66%

19. Rs. 1400 amounts to Rs. 1484 in 2 years at a certain rate. If interest rate is increased by 2%, then what will be the interest?

एक निश्चित दर पर 2 वर्ष में 1400 रूपये की राशि 1484 रूपये हो जाती है। यदि ब्याज दर में 2% की वृद्धि हुई है, तब ब्याज क्या हो?


Option”D” is correct

SI = 1484 – 1400 = Rs. 84

Now, 84 = 1400 × R × 2/100

R = 3%

R Increased by 2%

SI = 1400 × 5 × 2 / 100

SI = Rs. 140

20. The difference between simple interest on a certain sum at 7% per annum for 6 years and 10% per annum for 3 years is Rs. 540. The sum is

6 वर्ष के लिए 7% प्रति वर्ष और 3 वर्ष के लिए 10% प्रति वर्ष के लिए एक निश्चित राशि पर साधारण ब्याज के बीच का अंतर 540 रुपये है। यह राशि है


Option”D” is correct

Let the sum be Rs. x

According to problem,

⇒ x × 6 × (7/100) – x × 3 × (10/100) = 540

⇒ 0.42x – 0.3x = 540

⇒ x = 4500

∴ The sum = Rs. 4500

Alternate Method

Rate difference = (7% × 6) – (10% × 3) = 42% – 30% = 12%

∴ Interest = 12% of Sum

⇒ 540 = Sum × (12/100)

⇒ Sum = 540 × (100/12) = 4500.