6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

What is the reflection of the point (-1 , 5) in the line x = 1?

A) (3 , -5)	B) (-3 , -5)
C) (3 , 5)	D) (-3 , 5)

Answer & Explanation Answer: C) (3 , 5)

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

$\tan^{2} {Asin}^{2} A$ is equal to

A) tan2A - sin2A	B) tan2A + sin2A
C) cot2A - sin2A	D) cot2A + sin2A

Answer & Explanation Answer: A) tan2A - sin2A

Explanation:

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Filed Under: Simplification
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Q:

Simplify $486 b^{3} x^{2} a^{4} z^{3} / 27 a^{3} b^{2} z$

A) 18bx2az2	B) 18bx2a2z
C) 36ba2z	D) 36bxaz

Answer & Explanation Answer: A) 18bx2az2

Explanation:

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Filed Under: Simplification
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Q:

The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is:-

A) 1:2	B) 2:3
C) 3:4	D) 3:5

Answer & Explanation Answer: B) 2:3

Explanation:

Let the ratio be x : y
Total boys = 16.4 X x
Total girls = 15.4 X y
Total number of students in class = 16.4x + 15.4y
The average age of all students is 15.8
The total age of boys is 15.8x
The total age of girls is 15.8y
16.4x + 15.4y = 15.8x + 15.8y
0.6 x = 0.4 y
x/y = 0.4/0.6 = 2/3

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

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Q:

When a number is increased by 42, it becomes 121% of itself. What is the number?

A) 504	B) 200
C) 630	D) 378

Answer & Explanation Answer: B) 200

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Filed Under: Percentage
Exam Prep: Bank Exams

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Q:

Find the LCM of 12, 16, 20 and 24.

A) 180	B) 220
C) 240	D) 260

Answer & Explanation Answer: C) 240

Explanation:

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Filed Under: HCF and LCM
Exam Prep: Bank Exams

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Q:

If ${(x - 2)}^{2} + {(y + 3)}^{2} + {(z - 15)}^{2} = 0$ , then what is the value of x + y + z – 5?

A) 5	B) 9
C) 15	D) 20

Answer & Explanation Answer: B) 9

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Filed Under: Simplification
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Q:

Given: x - 5 ≤ 2x - 3 and 2x - 1/2 ≥ 5x + 2; then x can take which of the following values?

A) -1	B) 1
C) 3	D) -3

Quantitative Aptitude - Arithmetic Ability Questions

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