Simple & Compound Interest(Quantitative Aptitude > Interest ) Questions and answers for exam Preparation

Quantitative Aptitude > Interest

SIMPLE & COMPOUND INTEREST MCQs

Compound Interest, Simple Interest, Interest (combined)

Total Questions : 1171 | Page 112 of 118 pages

Question 1111. Find the simple interest on Rs.500 for 9 months at 6 paisa per month?

Rs.345
Rs.270
Rs.275
Rs.324

Discuss Question

Answer: Option B. -> Rs.270

I =
(500*9*6)/100 = 270

Question 1112. At what rate percent on simple interest will Rs.750 amount to Rs.900 in 5 years?

5%
3 1/2%
4%
5 1/2 %

Discuss Question

Answer: Option C. -> 4%

150 = (750*5*R)/100

R = 4%

Question 1113. What sum of money will produce Rs.70 as simple interest in 4 years at 3 1/2 percent?

Rs.525
Rs.500
Rs.550
Rs.555

Discuss Question

Answer: Option B. -> Rs.500

70 = (P*4*7/2)/100

P = 500

Question 1114. What is the rate percent when the simple interest on Rs.800 amount to Rs.160 in 4 Years?

5%
6%
4 1/2%
3 1/2 %

Discuss Question

Answer: Option A. -> 5%

160 = (180*4*R)/100

R = 5%

Question 1115. At what rate percent per annum will the simple interest on a sum of money be 2/5 of the amount in 10 years?

4%
5 2/3 %
6%
6 2/3 %

Discuss Question

Answer: Option A. -> 4%

Let sum = x. Then, S.I. = 2x/5, Time = 10 years.Rate = (100 * 2x) / (x * 5 * 10) = 4%

Question 1116. In how much time would the simple interest on a certain sum be 0.125 times the principal at 10% per annum?

1 1/4 years
1 3/4 years
2 1/4 years
2 3/4 years

Discuss Question

Answer: Option A. -> 1 1/4 years

Let sum = x. Then, S.I. = 0.125x = 1/8 x, R = 10%Time = (100 * x) / (x * 8 * 10) = 5/4 = 1 1/4 years.

Question 1117. A sum of money becomes 7/6 of itself in 3 years at a certain rate of simple interest. The rate per annum is?

5 5/9 %
6 5/9 %
18%
25%

Discuss Question

Answer: Option A. -> 5 5/9 %

Let sum = x. Then, amount = 7x/6S.I. = 7x/6 - x = x/6; Time = 3 years.Rate = (100 * x) / (x * 6 * 3) = 5 5/9 %.

Question 1118. A lends Rs. 2500 to B and a certain to C at the same time at 7% p.a. simple interest. If after 4 years, A altogether receives Rs. 1120 as interest from B and C, then the sum lent to C is?

Rs. 700
Rs. 1500
Rs. 4000
Rs. 6500

Discuss Question

Answer: Option B. -> Rs. 1500

Let the sum lent to C be Rs. x. Then,(2500 * 7 * 4) / 100 + (x * 7 * 4) / 100 = 11207/25 x = (1120 - 700) => x = 1500

Question 1119. A lent Rs. 5000 to B for 2 years and Rs. 3000 to C for 4 years on simple interest at the same rate of interest and received Rs. 2200 in all from both of them as interest. The rate of interest per annum is?

5%
7%
7 1/8 %
10%

Discuss Question

Answer: Option D. -> 10%

Let the rate be R% p.a. Then,(5000 * R * 2)/100 + (3000 * R * 4)/100 = 2200100 R + 120 R = 2200R = 10%

Question 1120. A person invests money in three different schemes for 6 years, 10 years and 12 years at 10 %, 12 %, and 15 %. Simple interest respectively. At the completion of each scheme, he gets the same interest. The ratio of his investments is

2: 3: 4
3: 4: 2
3: 4: 6
6: 3: 2

Discuss Question

Answer: Option D. -> 6: 3: 2

Let the required ratio be x: 1: y.
Then S.I on Rs x for 6 years at 10% p.a = S.I on re.1 10 years at 12 %p.a
X Ã— 10/100 Ã— 6 = 1 Ã— 12/100 Ã— 10
=> X = 120/60 =2
S.I on Re.1 for 10 years at 12 % p.a = S. I on Rs. Y for 12 years at 15 % p.a
Therefore, (1 x 12/100 x 10) = (y x 15/100 x 12)
=> y = 120/180 = 2/3
Required ratio = 2 : 1 = 2/3 = 6 : 3 : 2