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

Answer : D

Explanation

60% of 264 = 60100 x 264 = 158.4
50% of 234 = 50100 x 234 = 117
70% of 164 = 70100 x 164 = 114.8
20% of 1500 = 20100 x 1500 = 300
15% of 1056 = 15100 x 1056 = 158.4

Q 2 - If 120 is 20% of a number, then 120% of that number will be?

A - 120

B - 620

C - 720

D - 20

Answer : C

Explanation

let z be the number.
Then, 20% of z = 120 i.e (20100 x z) = 120
Therefore, z = 600
120% of z = (120100 x 600) = 720

Q 3 - If one number is 80% of the other and 4 times the sum of their squares is 656, then the numbers are?

A - 9, 18

B - 2, 3

C - 8, 10

D - 14, 24

Answer : B

Explanation

Let one number is p and other q.
The other number q will be 80% of p i.e. q = 45p
Therefore, 4 [p2 + (45p)2] = 656
4125p2 = 164
p = 10
other number, q = 80.

Q 4 - In an election between two candidates, one got 55% of the total valid votes, 20% of the votes were invalid. If the total number of votes was 7500, the number of valid votes that the other candidate got, was:

A - 3200

B - 4500

C - 1500

D - 2700

Answer : D

Explanation

Number of valid votes = 80100 x 7500 = 6000
Valid votes polled by other candidate = (45100 x 6000) = 2700

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 - A's salary is 50% more than that of B. How much percent is B's salary less than that of A?

A - 50

B - 100/3

C - 45

D - 200/3

Answer : B

Explanation

Required percentage = {50/(100+50)}*100%
= 50/150 * 100 = 100/3

Q 7 - Water tax is increased by 30% but its consumption is decreased by 20%. Then, the increase or decreased in the expenditure of the money is

A - no change

B - 5% increase

C - 4% decrease

D - 4 % increase

Answer : D

Explanation

Let tax =Rs.100 and
Consumption = 100 units
Original expenditure = Rs.100*100=Rs.10000
New expenditure=Rs.(130*80)  =Rs. 10400
Increase in expenditure by 4 %

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 - What percent of 2/7 is 1/35?

A - 2.5%

B - 10%

C - 25%

D - 20%

Answer : B

Explanation

 Let's have x % of 2/7 = 1/35
=> x/100 * (2/7) = 1/35 
=>x = 1/35 * 7/2 * 100
= 10%

Q 10 - In a class of 60 children, 30% children can speak only English, 20% both Hindi and English and the rest of the children only Hindi. How many children can speak Hindi?

A - 42

B - 36

C - 45

D - 48

Answer : A

Explanation

Total number of children in the class = 60
Number of children who can speak only in English = 30% of 60
= (30/100)*60
= 18
Number of children who can speak both Hindi and English = 20% of 60
= (20/100)*60
= 12
∴ Number of children who can speak only Hindi = 60  18  12 = 30
∴ Number of children who can speak Hindi = 30 + 12 = 42


aptitude_percentages.htm

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