6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

Find k, if the line 4x - y = 1 is perpendicular to the line 5x - ky = 2?

A) 20	B) -20
C) 4	D) -4

Answer & Explanation Answer: B) -20

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Q:

If $\tan^{2} A - \tan^{2} B = x$ , then the value of x is

A) (sin2A - sin2B)/(cos2A cos2B)	B) (sin2A sin2B)/(cos2A - cos2B)
C) (sin2A + sin2B)/(cos2A cos2B)	D) (sin2A sin2B)/(cos2A + cos2B)

Answer & Explanation Answer: A) (sin2A - sin2B)/(cos2A cos2B)

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Q:

An article was sold for Rs. 2,400 at a discount of 20%. Find the selling price, if the discount was 25%.

A) Rs. 2250	B) Rs. 2000
C) Rs. 1800	D) Rs. 2150

Answer & Explanation Answer: A) Rs. 2250

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Q:

Select the odd word/letters/number/number pair from the given alternatives.

A) 132	B) 145
C) 187	D) 144

Answer & Explanation Answer: D) 144

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Q:

Choose the one which is odd from the following options.

A) Coffee	B) Rice
C) Tobacco	D) Sugarcane

Answer & Explanation Answer: B) Rice

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Q:

If $C + \frac{1}{C} = \sqrt{3}$ , then what is the value of $C^{3} + \frac{1}{C^{3}} = ?$

A) 0	B) 3√3
C) 1/√3	D) 6√3

Answer & Explanation Answer: A) 0

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Q:

If cos 21° = x/y, then cosec 21° - cos 69° is equal to

A) x2yy2-x2	B) y2xy2-x2
C) y2xx2-y2	D) x2yx2-y2

Answer & Explanation Answer: A) x2yy2-x2

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Q:

What is the value of tan3A?

A) (3tanA - tan3A)/(1 - 3tan2A)	B) (3tanA + tan3A)/(1 + 3tan2A)
C) (3tanA - tan3A)/(1 + 3tan2A)	D) (3tanA + tan3A)/(1- 3tan2A)

Quantitative Aptitude - Arithmetic Ability Questions

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