Quantitative Aptitude - Arithmetic Ability Questions

Q:

The shadow of a tower on ground level is increased by 30 m, when the angle of depression by the sun changes from 60 deg to 30 deg. The height of the tower is

 

A) 12√3 m B) 17√3 m
C) 16√3 m D) 15√3 m
 
Answer & Explanation Answer: D) 15√3 m

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Q:

Which of the following numbers is a prime number?

A) 161 B) 181
C) 121 D) 141
 
Answer & Explanation Answer: B) 181

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Q:

___ is the point at which the perpendicular bisectors of the sides meet and the center of the circle that circumscribes the triangle is ____.

A) Incenter, Circumcenter B) Circumcenter, Circumcenter
C) Circumcenter, Incenter D) Orthocenter, Circumcenter
 
Answer & Explanation Answer: B) Circumcenter, Circumcenter

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Filed Under: Volume and Surface Area
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Q:

____ are twin prime numbers.

A) (4,9) B) (2,3)
C) (4,6) D) (3,5)
 
Answer & Explanation Answer: D) (3,5)

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Q:

In a triangle, one of the angles is three times the smallest and another is two times the smallest angle. Calculate the smallest angle.

 

A) 60° B) 30°  
C) 90° D) 45°
 
Answer & Explanation Answer: B) 30°  

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Q:

What is the square root of 576?

A) 24 B) 36
C) 34 D) 26
 
Answer & Explanation Answer: A) 24

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Filed Under: Square Roots and Cube Roots
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Q:

What is the fraction which, when taken away from 1/2, gives 2/3?

A) 1/3 B) -1/3
C) -1/6 D) 1/6
 
Answer & Explanation Answer: C) -1/6

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Q:

The angle of depression of the foot of a building from the top of a tower 30 m away is 30 deg. How high is the tower?

A) 10√3 m B) 20√3 m
C) 30 m D) 20 m
 
Answer & Explanation Answer: A) 10√3 m

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Filed Under: Height and Distance
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