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# Aptitude - Simple Interest Online Quiz

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.

Q 1 - A man had Rs 1600, some portion of which he loaned at 8% for each annum and the rest at 9% for each annum simple interest. On the off chance that the aggregate yearly premium be Rs 1340, the cash loaned at 8% is:

### Answer : C

### Explanation

Let the money lent at 8% P.a. be Rs. x. (x*8/100*1) + (16000-x)*9/100*1 = 1340 => 8x/100 + (144000-9x/100) =1340 => 8x+144000 -9x = 134000 x = 10000 Hence, the money lent at 8% = RS.10000.

Q 2 - The total of cash that will give Re 1 as basic premium for each at the rate of 5% for every annum is:

### Answer : C

### Explanation

Annual interest = Rs. 365, Rate = 5% p.a. Sum = (100*S.I/R*T) = Rs. (100*365/5*1) = Rs. 7300.

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:

### 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 cash bank finds that because of a fall in the yearly rate of interest from 8% to 31/4% his yearly salary reduces by Rs 61.50. His capital is:

### Answer : C

### Explanation

Let the capital be RS. x. then (x*8/100*1) ?(x*31/4*1/100*1) = 123/2 => 2x/25-31x/400 = 123/2 => 32x-31x = 24600 => x= 24600 Hence, the capital is Rs. 24600.

Q 5 - The simple interest on a whole for a long time is two fifth of the entirety. The rate percent per P.a. is:

### Answer : B

### Explanation

Let the sum be Rs. x. Then, S.I = Rs.2x/5 Rate = (100*S.I)/ (p*t) = (100*2x/5* 1/x*1/5) % p.a = 8% p.a.

Q 6 - Amit invests a certain sum at 10% per annum simple interest. In how many years will it become 5 times?

### Answer : C

### Explanation

We know, R = 100(n - 1)/t Or, t = 100(n - 1)/R = 100(5 - 1)/10 = 100*4/10 = 40 years

Q 7 - A sum of money becomes ^{7}⁄_{6} of itself in 3 years at a certain rate of simple interest. The rate per annum is?

### Answer : B

### Explanation

Let sum be z. Then, Amount =^{7z}⁄_{6}S.I. = (^{7z}⁄_{6}- 6) =^{z}⁄_{6}years = 3 years. therefore Rate =^{100 x z}⁄_{z x 6 x 3}=^{50}⁄_{9}= 5^{5}⁄_{9}

Q 8 - Mr. Thomas invested an amount of Rs. 13,900 divided in two different Schemes A and B at the simple interest rate of 14% p.a. and 11% p.a. respectively. If the total amount of simple interest earned in 2 years be Rs. 3508, what was the amount invested in scheme B?

### Answer : B

### Explanation

Let the sum be invested in scheme A be Rs. z and that in scheme B be Rs. (13900 - z) Then,^{z x 14 x 2}⁄_{100}+^{(13900 - z) x 11 x 2}⁄_{100}= 3508 28z -22z = 350800 - (13900 x 22) = 6z = 45000 = x = 7500 sum invested in scheme B = Rs (13900 - 7500) = 6400

Q 9 - At what rate percent per annum will a whole of cash twofold in 8 years?

### Answer : B

### Explanation

Let standard be Rs. P. at that point, S.I = Rs. P and time = 8 year ∴ Rate = (100*S.I)/P.T = (100*156/600*2) % p.a. = 13% p.a.