6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

What is the value of tan -240°?

A) -√3	B) 1/√3
C) -1/√3	D) √3

Answer & Explanation Answer: A) -√3

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

If x = 1/(√2+1) then the value of $x^{2} + 2 x - 1$ is

A) 2√2	B) 4
C) 0	D) 2

Answer & Explanation Answer: C) 0

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Q:

What will come in the place of question mark (?) in the following question (You do not have to calculate the exact value)?

√(3099.985 ÷ 62.001 + 14.001) = ?

A) 8	B) 13
C) 18	D) 23

Answer & Explanation Answer: A) 8

Explanation:

Ans.
√(3100 ÷ 62 + 14) = ?
√(50 + 14) = ?
√64 = ?
? = 8

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Exam Prep: AIEEE , Bank Exams , GATE

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Q:

If xy (x + y) = m, then the value of $x^{3} + y^{3} + 3 m$ is:

A) m3xy	B) m3x+y3
C) m3x3y3	D) mx3y3

Answer & Explanation Answer: D) mx3y3

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Q:

Makarand works 2 times as fast as Samarjit. If Samarjit can complete a job alone in 27 days, then in how many days can they together finish the job?

A) 6 days	B) 7 days
C) 5 days	D) 9 days

Answer & Explanation Answer: D) 9 days

Explanation:

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Filed Under: Time and Work
Exam Prep: Bank Exams

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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
Job Role: Bank PO , Bank Clerk

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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

Explanation:

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Filed Under: Average
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Q:

The average age of A and B is 18 years. After 3 years, C joins them and the average ages of A, B and C becomes 22 years. The age of C is ?

A) 20 years	B) 21 years
C) 24 years	D) 23 years

Quantitative Aptitude - Arithmetic Ability Questions

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