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 distinction between the basic interests got from two unique sources on Rs 1500 for a long time is Rs 13.50. The contrast between their rates of interest is:

A - 0.1%

B - 0.2%

C - 0.3%

D - 0.4%

Answer : C

Explanation

Let the rates of interest be x% p.a. Then,
(1500*x/100*3) ? (1500*y/100*3) =27/2
45(x-y) =27/2 => (x-y) = (27/2* 1/45)=3/10=0.3
Required difference = 0.3%

Q 4 - A man loses Rs 55.50 yearly when the yearly rate of interest tumbles from 11.5% to 10%. His capital is:

A - Rs 3700

B - Rs 7400

C - Rs 8325

D - Rs 11100

Answer : A

Explanation

Let the capital be Rs. x. then,
(x*23/2*1/100*1) ?(x*10*1/100*1) = 55.50
=> 23x/200 ?x/10 =111/2 => 23x-20x =11100 => 3x= 11100 => x = 3700
Hence, the capital is Rs. 3700.

Q 5 - A man disperses Rs. 25300 among his three children A, B, C. In a manner that the measure of there at 10% simple interest for a long time, 3 years and 4 years will be equivalent an offer is:

A - Rs. 7800

B - RS. 8400

C - RS. 9100

D - none of these

Answer : C

Explanation

Let the parts of A, B, C be x, Y, z respectively. Then
(x+ x*2*10/100)= (Y+ y*3*10/100) = (z+ z*4*10/100)
=> 6x/5 =13y/10 = 7z/5 =ℏ = 5ℏ/6, y = 10ℏ/13, z= 5ℏ/7
=> x: y: z = 5ℏ /6:10ℏ/13   :5ℏ/7 = 1/6:2/13: 1/7 = 91: 84:  78
A's part = Rs. (25300*91/253) = Rs. 9100.

Q 6 - In what time will the simple interest be 2/5 of the principal at 8 percent per annum?

A - 8 years

B - 7 years

C - 5 years

D - 6 years

Answer : C

Explanation

If Principal = Rs x, then I = 2x/5. Rate = 8 %

Time = I*100/P*R
= (2x/5)*100/x*8
= 5 years

Q 7 - The simple interest on a sum of money is 4/9 of the principal and the number of years is equal to the rate percent per annum. The rate per annum is

A - 5%

B - 20/3%

C - 6%

D - 7%

Answer : B

Explanation

We know, I = PTR/100

According to question,

I = 4P/9  and r = t

4P/9 = P*r*r/100
Or, r2 = 400/9
Or, r = 20/3

Q 8 - Peter invested an amount of Rs. 12000 at rate of interest of 10% p.a. simple interest and another amount at the rate of 20% p.a. simple interest. The total interest earned at the end of one year on the total amount invested became 14 p.c.p.a. Find the total amount invested?

A - 20000

B - 25000

C - 30000

D - 35000

Answer : A

Explanation

Let the second number be z. then, 
(12000 x 10 x 1100 + z x 20 x 1100) = ((12000 + z) x 14 x 1100) = 12000 + 20z = 168000 + 14z
= 6z = 48000
z = 8000
Therefore Total investment = Rs. (12000 + 8000) = 20000

Q 9 - Divide Rs. 2379 into 3 parts so that their amounts after 2,3 and 4 years respectively may be equal, the rate of interest being 5% per annum at simple interest. The first part is?

A - 759

B - 792

C - 818

D - 828

Answer : A

Explanation

Let the parts be a,b and [2379 - (a + b)]
a + (a x 25100) = b + (b x 35100) = c + (c x 45100)
= 11a10 = 23b20 = 6c5 = k
a = 10k11 
b = 20k23
c = 5k6 But, a + b + c = 2379 10k11 + 20k23 + 5k6 = 2379 1380k + 1320k + 1265k = 2379 x 11 x 23 x 6 k = 2379 x 11 x 23 x 63965 = 3 x 11 x 23 x 65 a = 828


aptitude_simple_interest.htm

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