6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

The value of $(\sec^{2} 45 - \cot^{2^{}} 45) - (\sin^{2} 30 + \sin^{2} 60)$ is

A) 1	B) 2√3
C) 0	D) 1/√2

Answer & Explanation Answer: C) 0

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Filed Under: Simplification
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Q:

If $x + \frac{1}{x} \neq 0 and x^{3} + \frac{1}{x^{3}} = 0, then the value of {(x + \frac{1}{x})}^{4} is :$

A) 9	B) 12
C) 15	D) 16

Answer & Explanation Answer: A) 9

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Q:

Select the odd number from the given alternatives.

A) 110	B) 140
C) 154	D) 198

Answer & Explanation Answer: B) 140

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Filed Under: Odd Man Out
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Q:

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

Sowing, Irrigation, Hoeing, ?

A) Harvesting	B) Crop selection
C) Land preparation	D) Seed selection

Answer & Explanation Answer: A) Harvesting

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Q:

The ratio of present ages of Sheetal and Divya is 6 : 5. After 8 years, their ages will be in the ratio of 22 : 19. What is the present age (in years) of Divya?

A) 22	B) 38
C) 34	D) 30

Answer & Explanation Answer: D) 30

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Filed Under: Problems on Ages
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Q:

The average marks in science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 of the actual marks 72 and 61 respectively, then what would be the correct average?

A) 68.5	B) 69
C) 69.5	D) 70

Answer & Explanation Answer: B) 69

Explanation:

Difference of marks = 72 + 61 –48 –65 = 20∴Correct average marks = 68 +20/20= 69

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Filed Under: Average
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Q:

The ratio 1 : 5 can be expressed in decimal as

A) 0.5	B) 0.2
C) 0.02	D) 0.1

Answer & Explanation Answer: B) 0.2

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Filed Under: Decimal Fractions
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Q:

What is the value of $\sqrt{513 - \sqrt{144} - \sqrt{81} - \sqrt{64}} ?$

A) 22	B) 21
C) 28	D) 19

Quantitative Aptitude - Arithmetic Ability Questions

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