6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

The ratio of the present ages of P and Q is 3 : 4. Five years ago, the ratio of their ages was 5 : 7. Find their present ages.

Answer

As the ratio of their present ages is 3 : 4 , let their present ages be 3X and 4X.

So, 5 years ago, as the ratio of their ages was 5 : 7, we can write (3x-5) : (4x-5) = 5 : 7. Solving, we get X = 10. Hence, their present ages are 3X = 30 and 4X = 40

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Subject: Problems on Ages

209 46868

Q:

$∆$ DEF is right angled at E. If m∠F = 60 deg, then find the value of (cotD - 2/√3).

A) 1 - √2	B) 1/√3
C) (2 - √3)/2√3	D) (2 - 2√3)/√3

Answer & Explanation Answer: B) 1/√3

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 46859

Q:

The perimeter of a square is 26 cm. Find its area (in cm2).

A) 42.25	B) 84.5
C) 39.25	D) 78.5

Answer & Explanation Answer: A) 42.25

Explanation:

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Filed Under: Area
Exam Prep: Bank Exams

0 46769

Q:

Determine the value of m for which $4 x + \frac{\sqrt{x}}{6} + \frac{m^{2}}{4}$ is a perfect square.

A) 1/24	B) 1/12
C) 12	D) 24

Answer & Explanation Answer: B) 1/12

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 46761

Q:

In how many ways can a group of 5 men and 2 women be made out of a total of 7 men and 3 women?

A) 135	B) 63
C) 125	D) 64

Answer & Explanation Answer: B) 63

Explanation:

Required number of ways = $(7 C_{5} * 3 C_{2}) = (7 C_{2} * 3 C_{1}) = 63$

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Filed Under: Permutations and Combinations

52 46647

Q:

X boys can do a piece of work in 24 days. In how much time (in days), 2X boys will do half of the work?

A) 6	B) 12
C) 18	D) 8

Answer & Explanation Answer: A) 6

Explanation:

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Filed Under: Time and Work
Exam Prep: Bank Exams

2 46614

Q:

What will come in place of question mark in the following equation ?

54.(?)3 + 543 + 5.43 = 603.26

A) 6	B) 1
C) 9	D) 8

Answer & Explanation Answer: D) 8

Explanation:

Let x + 543 + 5.43 = 603.26. Then, x = 603.26 - (543 + 5.43) = 603.26 - 548.43 =54.83

Missing digit = 8..

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Filed Under: Decimal Fractions

11 46464

Q:

Select the figure which does not belong to the group.

A) A	B) B
C) C	D) D

Quantitative Aptitude - Arithmetic Ability Questions

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