6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

The mean of 14 observations is 11. One more observation is included and the new mean becomes 12. The 15th observation is

A) 20	B) 24
C) 26	D) 28

Answer & Explanation Answer: C) 26

Explanation:

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Q:

In the following question, select the odd number from the given alternatives.

A) 145	B) 463
C) 581	D) 651

Answer & Explanation Answer: B) 463

Explanation:

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Q:

Find the odd word/number/letters from the given alternatives

A) IFMN	B) DAHI
C) ROVW	D) QNTV

Answer & Explanation Answer: D) QNTV

Explanation:

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Q:

What is the value of sin 330°?

A) 2	B) 2/√3
C) √2	D) -1/2

Answer & Explanation Answer: D) -1/2

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Q:

Given that the polynomial $(x^{2} + ax + b)$ leaves that same remainder when by (x –1) or (x + 1) What are the values of a and b respectively?

A) 4 and 0	B) 0 and 3
C) 3 and 0	D) 0 and any interger

Answer & Explanation Answer: D) 0 and any interger

Explanation:

Since x^2+ ax + b when divided by x-1 or x+1 leaves the same remainder

So on putting x=1 and x=-1 we get the same value

1+a+b = 1-a+b

2a=0

a=0

here b can take any value as it will always get cancelled out

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Q:

46% of 250 is equal to

A) 115	B) 92
C) 112	D) 13.5

Answer & Explanation Answer: A) 115

Explanation:

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Q:

If $cosθ = \frac{x^{2} - y^{2}}{x^{2} + y^{2}}$ , then the value of $cotθ$ is

A) 2xyx2-y2	B) 2xyx2+y2
C) x2+y22xy	D) x2-y22xy

Answer & Explanation Answer: D) x2-y22xy

Explanation:

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Q:

If (sinA + CosA)/(sin A - cos A) = 5/4, the value of (tan2A + 1)/(tan2A - 1) = ?

A) 41/40	B) 12/13
C) 40/41	D) -31/49

Quantitative Aptitude - Arithmetic Ability Questions

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