Aptitude - Simple Interest Online Quiz


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Following quiz provides Multiple Choice Questions (MCQs) related to Simple Interest. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Q 1 - At which aggregate the simple interest at the rate of 15/4 for each annum will be Rs 210 in 7/3 years?

A - Rs 1580

B - Rs 2400

C - Rs 2800

D - None of these

Answer : B

Explanation

Sum = Rs. (100*s.I/R*T) = Rs. (100*210)/(15/4*7/3) = Rs. (100*210*12/105) =2400 Rs.

Q 2 - On the off chance that the basic simple interest for a long time be equivalent to 30% of the principal, it will be equivalent to the vital after.

A - 10 years

B - 20 years

C - 22 years

D - 30 years

Answer : B

Explanation

Let the principle be Rs.x and the rate be R% p.a.  Then,
X*R/100*6 = 30/100*x = R= 5
Let the required time be t years.
X*5/100*t = x => t =100/5 = 20 years.

Q 3 - The simple interest at x% p.a. for x years will be Rs x on an aggregate of:

A - Rs x

B - Rs 100x

C - Rs (100/x)

D - Rs (101/x)

Answer : C

Explanation

Let the sum be Rs. P. then,
P = 100*S.I /Rate * time = (100*x/x*x) = Rs. 100/x

Q 4 - An aggregate of Rs 5000 was loaned mostly at 6% and incompletely at 9% basic interest. On the off chance that the aggregate yearly premium be Rs 390, the proportion in which the cash was loaned at given rates is:

A - 1:1

B - 1:2

C - 2:3

D - 3:2

Answer : C

Explanation

Let the money invested at the two rates be rs. x and Rs. (5000-x)
Then, (x*6/100*1) + (5000-x) *9/100*1 = 390
=> 3x/50 + 9(5000-x)/100 = 390
=> 6x+45000-9x = 39000 => 3x= 6000 => x= 2000.
Required ratio = 2000:3000= 2:3

Q 5 - With a given of rate of basic interest, the proportion of standard and measure of a sure timeframe is 4:5 , following 3 years , with the same rate of interest , the proportion of the rule and sum gets to be 5:7 , the rate of interest per annum is :

A - 4%

B - 5%

C - 6%

D - 7%

Answer : B

Explanation

After t years, let P =Rs. 4x and amount = Rs. 5x.
P + S.I for t years = Rs. 5x
P: {p+S.I for (t+3) years} = 5:7= 1: 7/5 = 4x: (7/5*4x) = 4x: 28x/5
∴ P+S.I.  For (t+3) years = Rs. 28x/5
On subtracting (i) from (ii), we get:
S.I for 3 years = Rs. (28x/5 -5x) = Rs. 3x/5
S.I on Rs. 4x for 3 years = 3x/5
∴ Rate = {(100*3x/5)/ (4x*3)} % p.a. = 5% p.a.

Q 6 - Vishwas borrowed a total amount of Rs 30,000 part of it at 12 % per annum and remaining at 10% per annum. If at the end of two years he paid in all Rs 36,480 to settle the loan amount, what was the amount borrowed at 12 % per annum?

A - Rs 16000

B - Rs 18000

C - Rs 17500

D - Rs 12000

Answer : D

Explanation

Let the sum borrowed at 12% per annum be Rs x.
So, sum borrowed at 10% per annum = Rs (30000 - x)
Simple Interest = Rs 36480 ? Rs 30000 = Rs 6480

According to the question,
x*2*12/100 + (30000 - x)*2*10/100 = 6480
or, 24x + 600000 - 20x = 648000
or, 4x = 48000
or, x = 12000

Q 7 - A sum of money becomes 76 of itself in 3 years at a certain rate of simple interest. The rate per annum is?

A - 12%

B - 559%

C - 18%

D - 659%

Answer : B

Explanation

Let sum be z. Then, Amount = 7z6
S.I. = (7z6 - 6) = z6 years = 3 years.
therefore Rate = 100 x zz x 6 x 3
= 509 = 559

Q 8 - The difference between the simple interest received from two different sources on Rs. 1500 for 3 years is Rs. 13.50. The difference between their rate of interest is?

A - 3%

B - 0.3%

C - 5%

D - 7%

Answer : B

Explanation

(1500 x R1 x 3100) - (1500 x R2 x 3100) = 13.50
= 4500 (R1 - R2) = 1350
= R1 - R2 = 13504500 = 0.3%

Q 9 - S.I On Rs. 5600 at 20/3% P.A for 9 month?

A - Rs. 280

B - Rs. 380

C - Rs. 480

D - Rs. 580

Answer : A

Explanation

Here P = 5600 Rs.R= 20/3% p.a. also, T = 9/12 = 3/4 year
S.I = (P*R*T)/100 = (5600*20/3*3/4*1/100) = Rs. 280

aptitude_simple_interest.htm
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