# 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 stored Rs 400 for a long time, Rs 550 for 4 year and Rs 1200 for 6 years. He got Rs 1020 as the aggregate simple interest. The rate of interest per annum is:

### Answer : B

### Explanation

Let the rate of interest be R% p.a. then, (400*R*2)/100 + (550*R*4)/100 + (1200*R*6)/100 = 1020 => 800R+2200R+7200R= 102000 => 10200R = 102000 => R = 10. Hence, the rate of interest is 10%.

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.

### 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 - x, y, z are three entireties of cash such that y is the simple interest on x and z is the basic on y for the same time and rate. Which of the accompanying is right?

### Answer : D

### Explanation

y= S.I. On Rs. x = Rs. (x*R*T/100); z=S.I on Rs. y = Rs. (y*r*t/100) ∴ y/z = x/y => y^{2}= zx.

Q 4 - Wasim acquired some cash at 6% p.a simple interest for the initial four years 8% p.a. for the following three years and 10% p.a. for a period past 7 years. Toward the end of 12 years, he earned Rs 5880 as simple interest. What amount of cash did he get?

### Answer : A

### Explanation

Let the money borrowed be Rs x. Then (x*6/100*4) + (x*8/100*3) + (x*10/100*5) = 5880 => 6x/25 +6x/25+x/2 = 5880 => (12x+12x+25x) = 294000 => 49x= 294000 X= 6000 Money borrowed = Rs. 6000.

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:

### 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 - What interest will be had on Rs 450 in 2 years if an interest of Rs 0.40 is charged on Rs 1 for 4 years

### Answer : A

### Explanation

Rate of Interest = Re 0.40 at Re 1 for 4 years = Re 0.10 at Re 1 for 1 year Simple Interest = PTR/100 = 450*2*10/100 = Rs 90

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 - If the annual ROI increases from 10% to 12^{1}⁄_{2}%, a man's yearly income increases by Rs. 1250. his principal (in Rs) is?

### Answer : B

### Explanation

Let the sum be z. Then, (z x^{25}⁄_{2}x^{1}⁄_{100}) - (^{z x 10 x 1}⁄_{100}) = 1250 = 25z - 20z = 250000

= 5z = 250000 z = 50000

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.