6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Find the odd one out ?

Hawk , Parrot , Owl , Eagle

A) Eagle	B) Owl
C) Parrot	D) Hawk

Answer & Explanation Answer: C) Parrot

Explanation:

All except Parrot are birds of prey.

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Filed Under: Odd Man Out
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18 214031

Q:

A problem is given to three students whose chances of solving it are 1/2, 1/3 and 1/4 respectively. What is the probability that the problem will be solved?

A) 1/4	B) 1/2
C) 3/4	D) 7/12

Answer & Explanation Answer: C) 3/4

Explanation:

Let A, B, C be the respective events of solving the problem and $A, B, C$ be the respective events of not solving the problem. Then A, B, C are independent event

$∴ A, B, C$ are independent events

Now, P(A) = 1/2 , P(B) = 1/3 and P(C)=1/4

$P (A) = \frac{1}{2}, P (B) = \frac{2}{3}, P (C) = \frac{3}{4}$

$∴$ P( none solves the problem) = P(not A) and (not B) and (not C)

= $P (A \cap B \cap C)$

= $P (A) P (B) P (C)$ $[∵ A, B, C a r e I n d e p e n d e n t]$

= $\frac{1}{2} \times \frac{2}{3} \times \frac{3}{4}$

= $\frac{1}{4}$

Hence, P(the problem will be solved) = 1 - P(none solves the problem)

= $1 - \frac{1}{4}$ = 3/4

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Filed Under: Probability
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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1032 210279

Q:

What is the value of $(6 x^{2} - 5 y^{2}) (6 x^{2} + 5 y^{2}), if x = \frac{1}{\sqrt{3}} and y = \frac{1}{\sqrt{5}}$ ?

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

Answer & Explanation Answer: B) 3

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

16 207286

Q:

7, 11, 19, 35, ?

Find the next number in the given number series?

A) 131	B) 94
C) 83	D) 67

Answer & Explanation Answer: D) 67

Explanation:

Here the given series 7, 11, 19, 35, ?

follows a pattern that (x 2 - 3) i.e,

7

7 x 2 - 3 = 11

11 x 2 - 3 = 19

19 x 2 - 3 = 35

35 x 2 - 3 = 67

67 x 2 - 3 = 131

Hence the next number in the given number series is 67.

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Filed Under: Odd Man Out
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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28 203750

Q:

Find out the wrong number in the given sequence of numbers.

56, 72, 90, 110, 132, 150

A) 72	B) 110
C) 132	D) 150

Answer & Explanation Answer: D) 150

Explanation:

The numbers are 7 x 8, 8 x 9, 9 x 10, 10 x 11, 11 x 12, 12 x 13.

So, 150 is wrong.

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17 202374

Q:

Find the unit place digit in the expression ${(159)}^{144} + {(114)}^{123} - {(110)}^{510} + {(213)}^{25}$

A) 3	B) 4
C) 7	D) 8

Answer & Explanation Answer: D) 8

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

1 202268

Q:

45% of 750 - 25% of 480 = ?

A) 337.50	B) 217.50
C) 376.21	D) 120

Answer & Explanation Answer: B) 217.50

Explanation:

Given expression = (45 x 750/100) - (25 x 480/100) = (337.50 - 120) = 217.50

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Filed Under: Percentage
Exam Prep: GATE , CAT , Bank Exams , AIEEE
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58 195044

Q:

Insert the missing number.

2, 6, 12, 20, 30, 42, 56, (....)

A) 61	B) 64
C) 72	D) 70

Answer & Explanation Answer: C) 72

Explanation:

The pattern is 1 x 2, 2 x 3, 3 x 4, 4 x 5, 5 x 6, 6 x 7, 7 x 8.

So, the next number is 8 x 9 = 72.

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90 191598

Quantitative Aptitude - Arithmetic Ability Questions

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