6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

If the cost price of an article is Rs x . It is marked up by 100%. It is sold at Rs 1,200 after giving 20% discount. What is value of x?

A) 750	B) 1500
C) 1000	D) 2000

Answer & Explanation Answer: A) 750

Explanation:

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Filed Under: Percentage
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Q:

If secA + tanA = x, then the value of x is

A) cosA/(1 + sinA)	B) √[cosA/(1 - sinA)]
C) √[cosA/(1 + sinA)]	D) cosA/(1 - sinA)

Answer & Explanation Answer: D) cosA/(1 - sinA)

Explanation:

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Q:

If a + b = 3 and ab = -4, then what is the value of $a^{3} + b^{3}$ ?

A) 36	B) 63
C) 12	D) -15

Answer & Explanation Answer: B) 63

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Q:

P(4,2) and R(-2,0) are vertices of a rhombus PQRS. What is the equation of diagonal QS.

A) x - 3y = -2	B) 3x + y = 4
C) 3x + y = -4	D) x - 3y = 2

Answer & Explanation Answer: B) 3x + y = 4

Explanation:

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Q:

$(2^{51} + 2^{52} + 2^{53} + 2^{54} + 2^{55})$ is divided by

A) 23	B) 58
C) 124	D) 127

Answer & Explanation Answer: C) 124

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Filed Under: Quantitative Aptitude - Arithmetic Ability

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Q:

Of the 5 numbers whose average is 72, the first is 1/8 times the sum of other 4. The first number is _____.

A) 60	B) 26
C) 40	D) 80

Answer & Explanation Answer: C) 40

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Filed Under: Average
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Q:

Both S.I. and C.I. is calculated with a similar rate of 10% per annum on a sum of rupees. If C.I. is calculated yearly for two years, then for what period must S.I. be evaluated such that S.I. = C.I.?

A) 4.2 years	B) 2.1 years
C) 1.1 years	D) 1.4 years

Answer & Explanation Answer: B) 2.1 years

Explanation:

Let time period of S.I. be T years.

Then for a principal amount, say P,

ATQ, as, S.I. = C.I. for rate =10%p.a. and

time for C.I. = 2(P x 10 x T)/100 = P{[ (100+10)/100 ]2-1}T/10 = [ 110/100 ]2–1 = [(11/10)2–1] = (121-100)/100T/10 = 21/100T = 21/10 = 2.1 years

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Filed Under: Simple Interest
Exam Prep: Bank Exams
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Q:

Kiran swims in a 90 m long pool. He covers 360 m in two minutes by swimming from one end to the other and back 0 along the same straight path, twice. Find the average speed of Kiran.

A) 4 m/s	B) 6 m/s
C) 3 m/s	D) 8 m/s

Quantitative Aptitude - Arithmetic Ability Questions

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