6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Out of the 60 students of a class, 29 took Mathematics, 32 took Biology and 8 took none of the two subjects. How many students took both Mathematics and Biology?

A) 8	B) 9
C) 7	D) 6

Answer & Explanation Answer: B) 9

Explanation:

Number of students who took only Mathematics n(m) = 29
Number of students who took only biology n(b) = 32
Total number of students n(t) = 60
Total number of students of both mathematics and biology n(m b) = 60 - 8 = 52
Total number of students who took both = 32 + 29 - 52 = 9

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Filed Under: Simplification
Exam Prep: AIEEE , Bank Exams , CAT

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Q:

If $θ$ is positive acute angle and $7 \cos^{2} Ɵ + 3 \sin^{2} Ɵ = 4$ , then the value of $θ$ is

A) 60°	B) 30°
C) 45°	D) 90°

Answer & Explanation Answer: A) 60°

Explanation:

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Exam Prep: Bank Exams

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Q:

The labourers A, B, C were given a contract of Rs. 750 for doing a certain piece of work. All the three together can finish the work in 8 days. A and C together can do it in 12 day, while A and B together can do it in 13 1/3 days. The money will be divided in the ratio

A) 4:5:6	B) 4:7:5
C) 5:7:4	D) 5:6:8

Answer & Explanation Answer: A) 4:5:6

Explanation:

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Filed Under: Time and Work
Exam Prep: Bank Exams

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Q:

What is the average of all numbers between 9 and 90 which are divisible by 8?

A) 53	B) 52
C) 51	D) 50

Answer & Explanation Answer: B) 52

Explanation:

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Filed Under: Average
Exam Prep: Bank Exams

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Q:

An angle is smaller than its supplementary angle by 70°. What is the measure of the angle?

A) 125°	B) 55°
C) 80°	D) 10°

Answer & Explanation Answer: B) 55°

Explanation:

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Filed Under: Area
Exam Prep: Bank Exams

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Q:

ΔABC is similar to ΔPQR. Length of AB is 36 cm and length of the corresponding side PQ is 16 cm. If area of ΔABC is 1296 sq cm, what is the area of ΔPQR?

A) 128 sq cm	B) 512 sq cm
C) 64 sq cm	D) 256 sq cm

Answer & Explanation Answer: D) 256 sq cm

Explanation:

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Filed Under: Area
Exam Prep: Bank Exams

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Q:

A shopkeeper marks his goods 40% above the cost price and allows a discount of 25% on it. His gain % is

A) 5%	B) 10%
C) 15%	D) 20%

Answer & Explanation Answer: A) 5%

Explanation:

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Filed Under: Percentage
Exam Prep: Bank Exams

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Q:

If $x^{2} + \frac{1}{x^{2}} = 2$ , then the value of $x - \frac{1}{x}$ is

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

Quantitative Aptitude - Arithmetic Ability Questions

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