Quantitative Aptitude - Arithmetic Ability Questions

Q:

The average weight of 25 bags is 55 kg. The weight of one bag was misread as 65 instead of 56. Find the correct mean value.

A) 55.25 B) 55.36
C) 54.64 D) 55.65
 
Answer & Explanation Answer: C) 54.64

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Filed Under: Average
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Q:

How many 3 ­digit numbers are completely divided by 4.

A) 225 B) 224
C) 223 D) 222
 
Answer & Explanation Answer: A) 225

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Filed Under: Problems on Numbers
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Q:

Which of the following numbers is not composite?

A) 209 B) 203
C) 161 D) 109
 
Answer & Explanation Answer: D) 109

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Filed Under: Problems on Numbers
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Q:

One pipe can fill an empty cistern in 4 hours while another can drain the cistern when full in 10 hours. Both the pipes were turned on when the cistern was half-empty. How long will it take for the cistern to be full?

A) 3 hours 20 minutes B) 6 hours 40 minutes
C) 4 hours 20 minutes D) 5 hours 30 minutes
 
Answer & Explanation Answer: A) 3 hours 20 minutes

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Filed Under: Pipes and Cistern
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Q:

The point equidistant from the sides of a triangle is called

A) Circumcenter B) Incentre
C) Orthocentre D) Centroid
 
Answer & Explanation Answer: B) Incentre

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Filed Under: Volume and Surface Area
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Q:

What is the value of cos 11π/6?

A) -1/√2 B) -√3/2
C) 2/√3 D) √3/2
 
Answer & Explanation Answer: D) √3/2

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Filed Under: Simplification
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Q:

From the top of a tower 60 mts high the angle of depression of the top and bottom of a pole are observed to be 45° and 60° respectively. If the pole and tower stand on the same plane, the height of the pole in meters is

A) 60(√3­1) B) 20(√3­1)
C) 20(3­√3) D) 20(√3+1)
 
Answer & Explanation Answer: C) 20(3­√3)

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Filed Under: Height and Distance
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Q:

What is the value of (cot45 - √2) ?

A) (√3-1)/2√3 B) (√3-1)/2
C) 1-√2 D) 1-√3
 
Answer & Explanation Answer: C) 1-√2

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