Q.1 What will be the simple interest on Rs. 5000 at 10% per annum for 2 years?
Rs. 1000
Rs. 1200
Rs. 1500
Rs. 2000
Explanation - SI = (P × R × T)/100 = (5000 × 10 × 2)/100 = 1000.
Correct answer is: Rs. 1000
Q.2 A sum of Rs. 800 earns Rs. 160 as simple interest in 4 years. What is the rate of interest?
4%
5%
6%
7%
Explanation - SI = (P × R × T)/100 => 160 = (800 × R × 4)/100 ⇒ R = 5%.
Correct answer is: 5%
Q.3 If Rs. 2400 amounts to Rs. 2880 in 3 years at simple interest, what is the rate of interest?
5%
6%
7%
8%
Explanation - SI = 2880 – 2400 = 480. SI = (P × R × T)/100 ⇒ 480 = (2400 × R × 3)/100 ⇒ R = 6%.
Correct answer is: 6%
Q.4 The simple interest on a sum of money is Rs. 1500 at 12% p.a. in 5 years. Find the principal.
Rs. 2000
Rs. 2500
Rs. 3000
Rs. 5000
Explanation - SI = (P × R × T)/100 ⇒ 1500 = (P × 12 × 5)/100 ⇒ P = 2500.
Correct answer is: Rs. 2500
Q.5 What will be the simple interest on Rs. 1500 for 3 years at 10% p.a.?
Rs. 300
Rs. 350
Rs. 400
Rs. 450
Explanation - SI = (1500 × 10 × 3)/100 = 450.
Correct answer is: Rs. 450
Q.6 A sum of Rs. 4000 earns Rs. 800 as SI in 4 years. Find the rate of interest.
3%
4%
5%
6%
Explanation - SI = (P × R × T)/100 ⇒ 800 = (4000 × R × 4)/100 ⇒ R = 5%.
Correct answer is: 5%
Q.7 At what rate percent per annum will a sum of Rs. 6000 yield Rs. 720 in 3 years as SI?
3%
4%
5%
6%
Explanation - SI = (P × R × T)/100 ⇒ 720 = (6000 × R × 3)/100 ⇒ R = 4%.
Correct answer is: 4%
Q.8 The SI on Rs. 1200 at 12% p.a. for 2 years is:
Rs. 200
Rs. 250
Rs. 288
Rs. 300
Explanation - SI = (1200 × 12 × 2)/100 = 288.
Correct answer is: Rs. 288
Q.9 If SI on a certain sum for 5 years at 6% p.a. is Rs. 900, find the principal.
Rs. 2500
Rs. 3000
Rs. 3500
Rs. 4000
Explanation - SI = (P × R × T)/100 ⇒ 900 = (P × 6 × 5)/100 ⇒ P = 3000.
Correct answer is: Rs. 3000
Q.10 A sum becomes Rs. 1440 in 2 years at 12% SI. Find the principal.
Rs. 1200
Rs. 1250
Rs. 1300
Rs. 1350
Explanation - SI = (P × 12 × 2)/100 = 0.24P. Amount = P + 0.24P = 1.24P = 1440 ⇒ P = 1200.
Correct answer is: Rs. 1200
Q.11 What will be SI on Rs. 2500 at 8% p.a. for 3 years?
Rs. 500
Rs. 600
Rs. 650
Rs. 700
Explanation - SI = (2500 × 8 × 3)/100 = 600.
Correct answer is: Rs. 600
Q.12 At what rate will Rs. 800 produce Rs. 128 as SI in 4 years?
3%
4%
5%
6%
Explanation - SI = (800 × R × 4)/100 = 128 ⇒ R = 4%.
Correct answer is: 4%
Q.13 A sum becomes Rs. 2160 in 4 years at 8% SI. Find the principal.
Rs. 1600
Rs. 1700
Rs. 1800
Rs. 2000
Explanation - SI = P × 8 × 4/100 = 0.32P. Amount = P + 0.32P = 1.32P = 2160 ⇒ P = 1800.
Correct answer is: Rs. 1800
Q.14 The SI on Rs. 500 at 8% p.a. for 1 year is:
Rs. 30
Rs. 35
Rs. 40
Rs. 45
Explanation - SI = (500 × 8 × 1)/100 = 40.
Correct answer is: Rs. 40
Q.15 The SI on Rs. 750 at 4% p.a. in 2 years is:
Rs. 50
Rs. 55
Rs. 60
Rs. 65
Explanation - SI = (750 × 4 × 2)/100 = 60.
Correct answer is: Rs. 60
Q.16 How much SI will Rs. 1200 earn in 3 years at 10% p.a.?
Rs. 300
Rs. 320
Rs. 340
Rs. 360
Explanation - SI = (1200 × 10 × 3)/100 = 360.
Correct answer is: Rs. 360
Q.17 If SI on Rs. 4000 in 2 years is Rs. 800, find the rate.
8%
9%
10%
12%
Explanation - SI = (P × R × T)/100 ⇒ 800 = (4000 × R × 2)/100 ⇒ R = 10%.
Correct answer is: 10%
Q.18 The SI on a sum at 5% p.a. for 3 years is Rs. 225. Find the sum.
Rs. 1200
Rs. 1300
Rs. 1400
Rs. 1500
Explanation - SI = (P × R × T)/100 ⇒ 225 = (P × 5 × 3)/100 ⇒ P = 1500.
Correct answer is: Rs. 1500
Q.19 At what rate percent will Rs. 2000 yield Rs. 500 in 5 years?
3%
4%
5%
6%
Explanation - SI = (2000 × R × 5)/100 = 500 ⇒ R = 5%.
Correct answer is: 5%
Q.20 A sum of money doubles itself in 10 years at SI. The rate of interest is:
8%
9%
10%
12%
Explanation - If sum doubles in 10 years, SI = Principal. ⇒ P = (P × R × 10)/100 ⇒ R = 10%.
Correct answer is: 10%
Q.21 If SI on Rs. 1500 in 2 years is Rs. 300, find the rate of interest.
8%
9%
10%
12%
Explanation - SI = (P × R × T)/100 ⇒ 300 = (1500 × R × 2)/100 ⇒ R = 10%.
Correct answer is: 10%
Q.22 What will be the amount of Rs. 2400 at 5% SI in 4 years?
Rs. 2800
Rs. 2850
Rs. 2880
Rs. 2900
Explanation - SI = (2400 × 5 × 4)/100 = 480. Amount = 2400 + 480 = 2880.
Correct answer is: Rs. 2880
Q.23 How much time will it take for Rs. 5000 to yield Rs. 2000 at 10% SI?
3 years
4 years
5 years
6 years
Explanation - SI = (P × R × T)/100 ⇒ 2000 = (5000 × 10 × T)/100 ⇒ T = 4 years.
Correct answer is: 4 years
Q.24 At 12% p.a., how many years will it take for a sum to become 1.5 times itself?
3 years
4 years
5 years
6 years
Explanation - If sum becomes 1.5 times, SI = 0.5P. ⇒ 0.5P = (P × 12 × T)/100 ⇒ T = 50/12 = 4.17 years ≈ 4 years.
Correct answer is: 4 years