Quantitative Aptitude - Arithmetic Ability Questions

Q:

If sin - 4π/3 = x, then the value of x is

A) -2 B) -2/√3
C) √3/2 D) √2
 
Answer & Explanation Answer: C) √3/2

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Q:

If a - b = 1 and ab = 6, then what is the value of a3- b3?

A) 21 B) 23
C) 19 D) 25
 
Answer & Explanation Answer: C) 19

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Q:

What is the value of sin 75°+ sin 15°?

A) √3 B) 2√3
C) √(3/2) D) 3/√2
 
Answer & Explanation Answer: C) √(3/2)

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Q:

If cotA/(1 + cot2A) = x, then the value of x is

A) sinA B) cosecA
C) secA D) cosA
 
Answer & Explanation Answer: D) cosA

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Q:

In a company 2/3 of the workers are girls, 1/2 of the girls are married and 1/3 of the married girls live in hostel. If 3/4 of the boys are married and 2/3 of married boys live in hostel. Calculate the part of workers who don’t live in hostel.

 

A) 11/18 B) 15/18  
C) 17/18   D) 13/18
 
Answer & Explanation Answer: D) 13/18

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Q:

What is the value of Sin 30° + 2 Cos 30° ?

A) (2√2 + 3)/√6 B) (9 + 2√3)/9
C) (1 + 2√3)/2 D) (2√6 + 1)/√3
 
Answer & Explanation Answer: C) (1 + 2√3)/2

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Q:

Common factor of 12a4b6, 18a6c2, 36a2b2 is

A) 36a2 B) 108b2
C) 6a2b2 D) 6a2
 
Answer & Explanation Answer: D) 6a2

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Q:

If a + b + c = 0 , then the value of a3 + b3+ c3 is

A) abc B) 2abc
C) 3abc D) 0
 
Answer & Explanation Answer: C) 3abc

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