Quantitative Aptitude - Arithmetic Ability Questions

Q:

The sum of two numbers is equal to thrice their difference. If the smaller of the numbers is 10 find the other number.

A) 15 B) 30
C) 40 D) None of these
 
Answer & Explanation Answer: D) None of these

Explanation:

Let larger number be x and smaller number be y.

Also, y = 10

According to question,

⇒(x + y) = 3((x –y)⇒(x + 10) = 3(x –10)

⇒2x = 40⇒x = 20

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Filed Under: Numbers
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Q:

If the length of the transverse tangent is 8 cm, then calculate the centre distance (in cm) of the two circles with radii 7 cm and 3 cm.

 

A) √100 B) √120  
C) √164   D) √180
 
Answer & Explanation Answer: C) √164  

Explanation:
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Filed Under: Area
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Q:

Select the odd number from the given alternatives.

A) 8 B) 27
C) 100 D) 125
 
Answer & Explanation Answer: C) 100

Explanation:
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Filed Under: Odd Man Out
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Q:

Two vessels of equal capacity contains juice and water in the ratio of 5 : 1 and 5 : 7 respectively. The mixture of both the vessels are mixed and transferred into a bigger vessel. What is the ratio of juice and water in the new mixture?

A) 3 : 2 B) 5 : 3
C) 5 : 4 D) 1 : 2
 
Answer & Explanation Answer: B) 5 : 3

Explanation:
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Filed Under: Alligation or Mixture
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Q:

In an isosceles triangle ABC, AB = AC and ∠A = 80°. The bisector of ∠B and ∠C meet at D. The ∠BDC is equal to

A) 90° B) 100°
C) 130° D) 80°
 
Answer & Explanation Answer: C) 130°

Explanation:
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Filed Under: Volume and Surface Area
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Q:

If the side of the equilateral triangle is 8√3 cm, then what is the length (in cm) of the in radius of the triangle?

A) 2 B) 4
C) 8√3 D) 16√3
 
Answer & Explanation Answer: B) 4

Explanation:
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Filed Under: Volume and Surface Area
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Q:

The age of A is three times the age of B. What is the ratio of the age of B to the age of A?

A) 1:3 B) 1:4
C) 1:2 D) 3:1
 
Answer & Explanation Answer: A) 1:3

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Filed Under: Problems on Ages
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Q:

The side of an equilateral triangle is 8 cm. Find its area (in cm2).

A) 25√3 B) 16√2
C) 25√2 D) 16√3
 
Answer & Explanation Answer: D) 16√3

Explanation:
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