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:

Calculate the area (in cm2 ) of a circle of radius 10.5 cm.

A) 693	B) 157.5
C) 315	D) 346.5

Answer & Explanation Answer: D) 346.5

Explanation:

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Filed Under: Area
Exam Prep: Bank Exams

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Q:

A table tennis player, lost 12 games out of 18 games played. Calculate the games won in terms of decimal.

A) 0.667	B) 0.067
C) 0.50	D) 0.333

Answer & Explanation Answer: D) 0.333

Explanation:

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Filed Under: Probability
Exam Prep: Bank Exams

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Q:

Find out the odd word/letters/number/number pair from the given alternatives.

A) 243	B) 687
C) 978	D) 456

Answer & Explanation Answer: D) 456

Explanation:

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Filed Under: Odd Man Out
Exam Prep: Bank Exams

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Q:

If x + (1/x) = √13, then what is the value of $x^{5}$ – (1/ $x^{5}$ )?

A) 169	B) 169√3
C) 393	D) 507

Answer & Explanation Answer: C) 393

Explanation:

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Filed Under: Quantitative Aptitude - Arithmetic Ability

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Q:

If a is positive and $a^{2} + \frac{1}{a^{2}} = 7, then a^{3} + \frac{1}{a^{3}} = ?$

A) 9	B) 27
C) 18	D) 0

Answer & Explanation Answer: C) 18

Explanation:

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Filed Under: Square Roots and Cube Roots

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Q:

Find out the odd word/letters/number/number pair from the given alternatives.

A) ST39	B) GF15
C) NO29	D) LM25

Answer & Explanation Answer: B) GF15

Explanation:

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Exam Prep: Bank Exams

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Q:

In the question, two equations I and II are given. You have to solve both the equations and give answer

$x^{2} - 11 x + 28 = 0 y^{2} - 18 y + 81 = 0$

A) x > y	B) x < y
C) x=y, or relation cannot be established between x and y	D) x ≥ y

Answer & Explanation Answer: B) x < y

Explanation:

x2 – 11x + 28=0

x2 – 7x – 4x + 28=0

x (x-7) – 4 (x-7)=0

(x-4) (x-7)=0 x=4, 7

y2 – 18y + 81=0

y2 –9y – 9y + 81=0

y (y-9) – 9 (y-9)=0

(y-9) (y-9)=0 y=9, 9

So, x<y.

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Quantitative Aptitude - Arithmetic Ability Questions

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