6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

3rd January 2018 was a Wednesday. Which of the following years will also have 3rd January on a Wednesday?

A) 2020	B) 2024
C) 2022	D) 2023

Answer & Explanation Answer: B) 2024

Explanation:

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Q:

A certain sum of money amounts to Rs 918 in 2 years and Rs 969 in 3.5 years at simple interest. What is the rate of interest (in %)?

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

Answer & Explanation Answer: A) 4

Explanation:

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Q:

The average weight of Shubha, Govinda and Reshma is 65 kg. If the average weight of Shubha and Govinda be 63 kg and that of Govinda and Reshma be 70 kg, then the weight of Govinda is

A) 41	B) 71
C) 88	D) 46

Answer & Explanation Answer: B) 71

Explanation:

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Q:

If $x^{3} - y^{3} = 81$ and x – y = 3, then what is the value of $x^{2} + y^{2}$ ?

A) 18	B) 21
C) 27	D) 36

Answer & Explanation Answer: B) 21

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Q:

A 12 m long wire is cut into two pieces, one of which is bent into a circle and the other into a square enclosing the circle. What is the radius of the circle?

A) 12/π+4	B) 6/π+4
C) 3/π+4	D) 6/π+2√2

Answer & Explanation Answer: B) 6/π+4

Explanation:

As it is clear that 2r = a where a is the side of the square and

R is the radius of circle

It is given that 2πr + 4a = 12

a = 12/(π+4)

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Q:

In the question given below, two equations are provided. Solve the equations and establish the relationship between x and y

$I . 2 x^{2} - 13 x - 189 = 0 II . 2 y^{2} - 3 y - 189 = 0$

A) x>y	B) x≥y
C) x<y	D) x≤y

Answer & Explanation Answer:

Explanation:

I. 2x2 - 13x - 189 = 0 2x2 - 27x + 14x - 189 = 0 x(2x - 27) + 7(2x - 27) = 0 x = -7, 27/2

II. 2y2 - 3y - 189 = 0 2y2 - 21y + 18y - 189 = 0 y(2y - 21) + 9(2y - 21) = 0 y = -9, 21/2

When x, as well as y, have both positive and negative values then no relationship can be established between them because if we consider x to be positive then the negative value of y will be lesser than x. If we consider x to be negative then positive value of y will be greater than x.

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Q:

The standard deviation of the set {10, 10, 10, 10, 10} is

A) 0	B) 1
C) 5	D) 10

Answer & Explanation Answer: A) 0

Explanation:

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Q:

Parvesh is three times as efficient as Dinesh. Parvesh takes 20 days less than Dinesh to complete a book. If both of them work together, then in how many days the book will be completed?

A) 7.5	B) 8
C) 10	D) 6.5

Quantitative Aptitude - Arithmetic Ability Questions

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