6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

What is the value of $\sin (90 ° + 2 A) [4 - \cos 2 (90 ° - 2 A)] ?$

A) 2(cos3 A – sin3 A)	B) 2(cos3 A + sin3 A)
C) 4(cos6 A+ sin6 A)	D) 4(cos6 A – sin6 A)

Answer & Explanation Answer: D) 4(cos6 A – sin6 A)

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Q:

If $x^{2} - 2 x + 1 = 0,$ then the value of $x^{4} + \frac{1}{x^{4}}$ is

A) 0	B) 1
C) 2	D) 3

Answer & Explanation Answer: B) 1

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Q:

If $x + \frac{1}{x} = - 2,$ then the value of $x^{7} + \frac{1}{x^{7}}$

A) 1	B) -1
C) 0	D) -2

Answer & Explanation Answer: D) -2

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Filed Under: Square Roots and Cube Roots
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Q:

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

A) Teacher	B) Lawyer
C) Doctor	D) Manager

Answer & Explanation Answer: D) Manager

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Q:

If x – 3 + [1/(x – 3)] = 4, what is the value of $[{(x - 3)}^{3} + [1 / {(x - 3)}^{3}]$ ?

A) 14	B) 18
C) 52	D) 76

Answer & Explanation Answer: C) 52

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Q:

What is the value of 1/√2 Cot 30° + 1/√3 Cosec 60°?

A) (3√3 + 2√2)/3√2	B) (3√3 - 2√2)/3√2
C) (3√3 + 2√2)/√2	D) (3√3 - 2√2)/√2

Answer & Explanation Answer: A) (3√3 + 2√2)/3√2

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Q:

In a class of 66 students there are 33 girls. The average weight of these girls is 61 Kg and average weight of the full class is 66 kgs. What is the average weight of the boys of the class?

A) 72	B) 73
C) 69	D) 71

Answer & Explanation Answer: D) 71

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Filed Under: Average
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Q:

In the given figure, PQRS is a square and SRT is an equilateral triangle. What is the value (in degrees) of angle SOR?

A) 45	B) 55
C) 60	D) 75

Quantitative Aptitude - Arithmetic Ability Questions

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