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RBI Grade B Simple & Compound Interest Questions with Answers & Explanations

20 Simple & Compound Interest questions from the Quantitative Aptitude section of RBI Grade B, each with the correct answer and a worked explanation. Try each question first, then tap Show answer to check. When you're ready, take the timed chapter-wise test to see your all-India rank.

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Question 1

What is the simple interest on ₹20,500 at 12% per annum for 2 years?

  1. A₹5,412
  2. B₹4,920
  3. C₹7,380
  4. D₹2,460
  5. ENone of these
Show answer
Answer: (B) ₹4,920 SI = P × R × T / 100 = 20500 × 12 × 2 / 100 = ₹4,920.
Question 2

What is the compound interest on ₹1,900 for 2 years at 10% per annum, compounded annually?

  1. A₹589
  2. B₹380
  3. C₹438.90
  4. D₹399
  5. ENone of these
Show answer
Answer: (D) ₹399 CI = P[(1 + R/100)² − 1] = ₹399.
Question 3

What is the simple interest on ₹11,500 at 6% per annum for 5 years?

  1. A₹3,795
  2. B₹3,450
  3. C₹690
  4. D₹4,140
  5. E₹2,760
Show answer
Answer: (B) ₹3,450 SI = P × R × T / 100 = 11500 × 6 × 5 / 100 = ₹3,450.
Question 4

What is the difference between compound interest and simple interest on ₹3,500 for 2 years at 20% per annum?

  1. A₹150
  2. B₹280
  3. C₹700
  4. D₹140
  5. E₹210
Show answer
Answer: (D) ₹140 For 2 years, CI − SI = P × (R/100)² = ₹140.
Question 5

What is the simple interest on ₹8,500 at 12% per annum for 3 years?

  1. A₹1,020
  2. B₹3,060
  3. C₹3,366
  4. D₹4,080
  5. E₹2,040
Show answer
Answer: (B) ₹3,060 SI = P × R × T / 100 = 8500 × 12 × 3 / 100 = ₹3,060.
Question 6

What is the difference between compound interest and simple interest on ₹3,700 for 2 years at 20% per annum?

  1. A₹148
  2. B₹740
  3. C₹158
  4. D₹222
  5. E₹296
Show answer
Answer: (A) ₹148 For 2 years, CI − SI = P × (R/100)² = ₹148.
Question 7

What is the simple interest on ₹7,500 at 10% per annum for 5 years?

  1. A₹4,500
  2. B₹4,125
  3. C₹750
  4. D₹3,750
  5. E₹3,000
Show answer
Answer: (D) ₹3,750 SI = P × R × T / 100 = 7500 × 10 × 5 / 100 = ₹3,750.
Question 8

What is the difference between compound interest and simple interest on ₹2,800 for 2 years at 10% per annum?

  1. A₹28
  2. B₹56
  3. C₹42
  4. D₹38
  5. E₹280
Show answer
Answer: (A) ₹28 For 2 years, CI − SI = P × (R/100)² = ₹28.
Question 9

What is the simple interest on ₹22,000 at 10% per annum for 4 years?

  1. A₹2,200
  2. B₹9,680
  3. C₹11,000
  4. D₹8,800
  5. E₹6,600
Show answer
Answer: (D) ₹8,800 SI = P × R × T / 100 = 22000 × 10 × 4 / 100 = ₹8,800.
Question 10

What is the difference between compound interest and simple interest on ₹600 for 2 years at 10% per annum?

  1. A₹16
  2. B₹6
  3. C₹60
  4. D₹9
  5. E₹12
Show answer
Answer: (B) ₹6 For 2 years, CI − SI = P × (R/100)² = ₹6.

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Question 11

What is the simple interest on ₹2,000 at 5% per annum for 3 years?

  1. A₹100
  2. B₹300
  3. C₹330
  4. D₹200
  5. E₹400
Show answer
Answer: (B) ₹300 SI = P × R × T / 100 = 2000 × 5 × 3 / 100 = ₹300.
Question 12

What is the compound interest on ₹3,300 for 2 years at 20% per annum, compounded annually?

  1. A₹2,112
  2. B₹1,320
  3. C₹1,452
  4. D₹1,597.20
  5. E₹1,419
Show answer
Answer: (C) ₹1,452 CI = P[(1 + R/100)² − 1] = ₹1,452.
Question 13

What is the simple interest on ₹15,000 at 12% per annum for 3 years?

  1. A₹3,600
  2. B₹7,200
  3. C₹5,940
  4. D₹5,400
  5. E₹1,800
Show answer
Answer: (D) ₹5,400 SI = P × R × T / 100 = 15000 × 12 × 3 / 100 = ₹5,400.
Question 14

What is the compound interest on ₹3,300 for 2 years at 10% per annum, compounded annually?

  1. A₹762.30
  2. B₹693
  3. C₹1,023
  4. D₹660
  5. ENone of these
Show answer
Answer: (B) ₹693 CI = P[(1 + R/100)² − 1] = ₹693.
Question 15

What is the simple interest on ₹3,500 at 4% per annum for 4 years?

  1. A₹616
  2. B₹420
  3. C₹560
  4. D₹140
  5. E₹700
Show answer
Answer: (C) ₹560 SI = P × R × T / 100 = 3500 × 4 × 4 / 100 = ₹560.
Question 16

What is the difference between compound interest and simple interest on ₹11,600 for 2 years at 5% per annum?

  1. A₹580
  2. B₹39
  3. C₹58
  4. D₹29
  5. E₹43.50
Show answer
Answer: (D) ₹29 For 2 years, CI − SI = P × (R/100)² = ₹29.
Question 17

What is the simple interest on ₹30,000 at 10% per annum for 4 years?

  1. A₹12,000
  2. B₹13,200
  3. C₹9,000
  4. D₹15,000
  5. E₹3,000
Show answer
Answer: (A) ₹12,000 SI = P × R × T / 100 = 30000 × 10 × 4 / 100 = ₹12,000.
Question 18

What is the simple interest on ₹3,000 at 8% per annum for 5 years?

  1. A₹1,440
  2. B₹1,320
  3. C₹1,200
  4. D₹240
  5. E₹960
Show answer
Answer: (C) ₹1,200 SI = P × R × T / 100 = 3000 × 8 × 5 / 100 = ₹1,200.
Question 19

What is the simple interest on ₹2,500 at 8% per annum for 3 years?

  1. A₹200
  2. B₹800
  3. C₹660
  4. D₹600
  5. E₹400
Show answer
Answer: (D) ₹600 SI = P × R × T / 100 = 2500 × 8 × 3 / 100 = ₹600.
Question 20

What is the compound interest on ₹1,700 for 2 years at 20% per annum, compounded annually?

  1. A₹748
  2. B₹1,088
  3. C₹731
  4. D₹680
  5. E₹822.80
Show answer
Answer: (A) ₹748 CI = P[(1 + R/100)² − 1] = ₹748.

These are RankerClub practice questions written in the RBI Grade B pattern. They are not official SSC/IBPS/RRB papers.

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