# Aptitude - Percentages Online Quiz

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.

### Answer : D

### Explanation

Half of 1% = (^{1}⁄_{2}x^{1}⁄_{100}) =^{0.5}⁄_{100}= 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?

### 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?

### Answer : A

### Explanation

Let s be the number of students appeared for the examination. Then, 65% of s = 455 i.e.^{65}⁄_{100}s = 455 Therefore, Students = 700

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

### Answer : D

### Explanation

p% of q = (^{p}⁄_{100}x q) = (^{q}⁄_{100}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?

### Answer : D

### Explanation

^{60}⁄_{100}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 =^{130}⁄_{400}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?

### 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

### 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?

### 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

### 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?

### Answer : D

### Explanation

Area of circle = Πr2 Area of new circle = Π(4r^{2}) = 16Πr^{2}= 16 times the area of the original circle ∴ Required percentage = (16 – 1)/1 * 100 = 1500%