Aptitude - Percentages Online Quiz


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Following quiz provides Multiple Choice Questions (MCQs) related to Percentages. 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 - Half of 1% written as a decimal is :

A - 0.005

B - 5

C - 0.5

D - 0.005

Answer : D

Explanation

Half of 1% = (12 x 1100)
= 0.5100 = 0.005 %

Q 2 - It costs Rs. 1 to photocopy a sheet of paper. However, 2% discount is allowed on all photocopies done after first 1000 sheets. How much will it cost to copy 5000 sheets of paper?

A - 4880

B - 4980

C - 4920

D - 4900

Answer : C

Explanation

Cost = 1 x 1000 + (100-2)% of 1 x 4000
= 1000 + (98)% of 4000
= 1000 + 3920 = Rs. 4920

Q 3 - In an examination, 35% of the students passed and 455 failed. How many students appeared for the examination?

A - 700

B - 500

C - 900

D - 1100

Answer : A

Explanation

Let s be the number of students appeared for the examination.
Then, 65% of s = 455
i.e. 65100s = 455
Therefore, Students = 700

Q 4 - If A = p% of q and B = q% of p, then which of the following is true?

A - A is smaller than B

B - A is greater than B

C - Relationship between A and B cannot be determined

D - A = B

Answer : D

Explanation

p% of q = (p100 x q) = (q100 x p) = q% of p
→ A = B

Q 5 - Of the 1000 inhabitants of a town, 60% are males of whom 20% are literate. If, of all the inhabitants, 25% are literate, then what percent of the females of the town are literate?

A - 30%

B - 37.5%

C - 35%

D - 32.5%

Answer : D

Explanation

60100 x 1000 = 600 = number of males
→ 1000 - 600 = 400 = number of females
Literates = 25% of 1000 = 250
Literate males = 20% of 600 = 120
Literate females = 250 - 120 = 130
Therefore, the percent of the females literate = 130400 x 100 = 32.5%

Q 6 - In a recent survey 40% houses contained 2 or more people. Of those houses containing only one person, 25% were having only a male. What is the percentage of all the houses which contain exactly one females and no males?

A - 75

B - 40

C - 15

D - 45

Answer : D

Explanation

As per question, 40% houses contain two or more people.
i.e. 60% houses have only one person. O these houses 25% have male.
∴ 75% of 60% of the total houses have only one female and no males.
 = .75 * 60% = 45%

Q 7 - The income of broker remains unchanged though the rate of commission is increased from 5% to 6% .the percentage of slump in business is

A - 100/3

B - 100/6

C - 100/7

D - 100/8

Answer : B

Explanation

Let the business value changes from x to y
Then, 5% of x=6% of y or 5/100*x=6/100 y
Or y = 5/6x
Change in business = x-5/6x=1/6x
 Percentage slum in business=1/6 x * 1/x*100=100/6 %

Q 8 - The estimation of a machine deteriorates at the rate of 10% for every annum. On the off chance that its present worth is Rs. 8100, what will be its worth following 3 years?

A - Rs 29049

B - Rs 59049

C - Rs 49049

D - Rs 39049

Answer : B

Explanation

Value of the machine after three years
= Rs{81000*(1-10/100)3 }
 = 81000* 9/10*9/10*9/10 = Rs 59049

Q 9 - ?% of 24 = 0.72

A - 10.5

B - 11.5

C - 12.5

D - 13.5

Answer : C

Explanation

Let x% of 24 = 0.72. Then,
(x/100*24)=0.72= 72/100=>24x=72 =>x=3.

Q 10 - If the radius of a circle is increased by 4 times, what will be the percentage increase in its area?

A - 400%

B - 800%

C - 900%

D - 1500%

Answer : D

Explanation

Area of circle = Πr2
Area of new circle = Π(4r2) = 16Πr2
= 16 times the area of the original circle
∴ Required percentage = (16  1)/1 * 100
= 1500%


aptitude_percentages.htm

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