6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

3.2% of 500 × 2. 4% of ? = 312

A) 812.5	B) 829.75
C) 749.85	D) 799.5

Answer & Explanation Answer: A) 812.5

Explanation:

$Given 3.2 % of 500 \times 2 . 4 % of ? = 312 Then, 3.2 x \frac{500}{100} x 2.4 x \frac{?}{100} = 312 16 x \frac{2.4 x ?}{100} = 312 \frac{9.6 x ?}{25} = 312 9.6 x ? = 7800 ? = \frac{7800}{9.6} ? = 812.5$

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Filed Under: Percentage
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7 4819

Q:

The ratio of two positive numbers is 3 : 5 and the average of the number is 48. What is the product of numbers?

A) 3365	B) 2160
C) 1854	D) 1632

Answer & Explanation Answer: B) 2160

Explanation:

Let the number be 3p and 5p

ATQ,

8p = 2 x 48

p = 96/8

p = 12

The numbers are 36 and 60.

Hence, the product of the numbers = 36 x 60 = 2160.

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Filed Under: Problems on Numbers
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3 4817

Q:

The effective annual rate of interest corresponding to nominal rate of 6% per annum payable half yearly is

A) 5%	B) 6%
C) 7%	D) 6.09%

Answer & Explanation Answer: D) 6.09%

Explanation:

amount=[100(1+3/100)^2]=Rs.106.09

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Filed Under: Compound Interest
Exam Prep: Bank Exams
Job Role: Bank PO

1 4816

Q:

The present worth of a bill due sometime hence is Rs. 1100 and the true discount on the bill is Rs. 110. Find the banker's discount and the banker's gain.

A) Rs.145	B) Rs.136
C) Rs.121	D) Rs.112

Answer & Explanation Answer: C) Rs.121

Explanation:

T.D. =Ö(P.W.*B.G)

B.G. =(T.D.)2/ P.W.

= Rs.[(110x110)/ 1100]

= Rs. 11.

B.D.= (T.D. + B.G.) = Rs. (110 + 11) = Rs. 121.

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Filed Under: Banker's Discount

1 4805

Q:

A class consists of both boys and girls along with a teacher. After a class, the teacher drinks 9 litres of water, a boy drinks 7 litres of water and a girl drinks 4 litres of water. If after a class 42 litres of water was consumed, find the number of girls in the class ?

A) 8	B) 6
C) 5	D) 3

Answer & Explanation Answer: D) 3

Explanation:

Given teacher drinks 9 ltr
Let number of boys be 'A'.
Let number of girls be 'B'.
Boy drinks 7 ltr and girl drinks 4 ltr
After class total water consumed = 42 ltr
Then,
9 + 7A + 4B = 42
=> 7A + 4B = 33
By trial and error method,
The only integers which satisfy the equation is A = 3 and B = 3
Therefore, number of girls in the class = 3.

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Filed Under: Simplification
Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE
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6 4804

Q:

In a game of 100 points, A can give B 20 points and C 28 points. Then, B can give C:

A) 8 points	B) 10 points
C) 14points	D) 40points

Answer & Explanation Answer: B) 10 points

Explanation:

A : B = 100 : 80.

A : C = 100 : 72.

B:C = B/A*A/C = 80/10*100/72 = 10/9 = 100/90 = 100:90

B can give C 10 points

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Filed Under: Races and Games

15 4803

Q:

If two painters can complete two rooms in two hours, how many painters would it take to do 18 rooms in 6 hours?

A) 2 painters	B) 6 painters
C) 4 painters	D) None

Answer & Explanation Answer: B) 6 painters

Explanation:

Two painters can complete two rooms in two hours.So 18 rooms can be painted in 6 hrs by 6 painters

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Filed Under: Problems on Numbers

1 4803

Q:

Derrick's dad bought new tires for $900 using a credit card. His card has an interest rate of 19%. If he has no other charges on his card and does not pay off his balance at the end of the month, how much money will he owe after one month?

A) 11.25	B) 13.25
C) 14.25	D) 15.25

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