6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Study the information carefully to answer the following questions: An urn contains 5 red, 3 green, 2 blue and 4 yellow marbles. If three marbles are picked at random, what is the probability that one is green and two are yellow?

A) 3/14	B) 2/91
C) 9/182	D) 7/545

Answer & Explanation Answer: C) 9/182

Explanation:

Required probability = $\frac{3 \times 6}{364} = \frac{9}{182}$

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Filed Under: Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams , GATE
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Q:

If cosecA - cotA = x, then the value of x is

A) sinA/(1 - cosA)	B) √[sinA/(1 + cosA)
C) sinA/(1 + cosA)	D) √[sinA/(1 - cosA)]

Answer & Explanation Answer: C) sinA/(1 + cosA)

Explanation:

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Q:

If the angle of elevation of the top of a pillar from the ground level is raised from $30 ° t o 60 °$ , the length of the shadow of a pillar of height $50 \sqrt{3}$ will be decreased by

A) 60 m	B) 75 m
C) 100 m	D) 50 m

Answer & Explanation Answer: C) 100 m

Explanation:

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Filed Under: Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams , GATE

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Q:

The ten's digit of a 2digit number is greater than the units digit by 4. If we subtract 36 from the number, the new number obtained is a number formed by interchange of the digits. Find the number.

A) 37	B) 18
C) 81	D) 73

Answer & Explanation Answer: D) 73

Explanation:

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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

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Q:

What is the value of $\sqrt{513 - \sqrt{144} - \sqrt{81} - \sqrt{64}} ?$

A) 22	B) 21
C) 28	D) 19

Answer & Explanation Answer: A) 22

Explanation:

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

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Q:

Determine the value of $(\frac{1}{r} + \frac{1}{s})$ when $r^{3} + s^{3} = 0 and r + s = 6$ ?

A) 0	B) 0.5
C) 1	D) 2

Answer & Explanation Answer: B) 0.5

Explanation:

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Filed Under: Square Roots and Cube Roots

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Q:

19 personswentto a hotel for a combineddinner party. 13 of them spent Rs 79 each on their dinner and the rest spent Rs 4 more than the average expenditure of all the 19. What was the total money spent by them?

A) 1628.4	B) 1534
C) 1492	D) None of these

Answer & Explanation Answer: D) None of these

Explanation:

Let the average expenditure of 19 people be x

⇒19x = 13 X 79 + 6 X (x+4)⇒19x = 13 X 79 + 6x +24

⇒x = 80.84

So, total money spent by them = 1536.07

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Filed Under: Average
Exam Prep: Bank Exams

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Q:

If $\sec^{2} θ + \tan^{2} θ = 5 / 3$ , then what is the value of tan2θ?

A) 2√3	B) √3
C) 1/√3	D) Cannot be determined

Quantitative Aptitude - Arithmetic Ability Questions

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