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 - 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:

A - 8%

B - 10%

C - 15%

D - 20%

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.

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 - 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?

A - xyz=1

B - z2=xy

C - x2 =yz

D - y2= zx

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 => y2= 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?

A - Rs 6000

B - Rs 8000

C - Rs 9000

D - Rs 10000

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:

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 - 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

A - Rs 90

B - Rs 180

C - Rs 33

D - Rs 100

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 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 - If the annual ROI increases from 10% to 1212%, a man's yearly income increases by Rs. 1250. his principal (in Rs) is?

A - 45000

B - 50000

C - 60000

D - 65000

Answer : B

Explanation

Let the sum be z. Then,
(z x 252 x 1100) - (z x 10 x 1100) = 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?

A - 12% p.a.

B - 13% p.a.

C - 14% p.a.

D - 15% p.a.

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.


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