Quantitative Aptitude - Arithmetic Ability Questions

Q:

In a triangle, the distance of the centroid from the three vertices is 4cm, 6cm and 8cm respectively. Then the length of the smallest median is:

A) 8 B) 7
C) 6 D) 5
 
Answer & Explanation Answer: C) 6

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Q:

In an equilateral triangle ABC, G is the centroid. Each side of the triangle is 6 cm. The length of AG is

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

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Q:

In an alloy of German silver the ratio of copper to zinc was 17:7 while that of nickel to zinc was 4 :3. The ratio of copper to zinc to nickel in the alloy was

A) 17 : 21 : 4 B) 51 : 21 : 28
C) 68 : 28 : 21 D) 17 : 28 : 3
 
Answer & Explanation Answer: B) 51 : 21 : 28

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Filed Under: Ratios and Proportions
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Q:

Rehman goes on a trip on his motor-cycle and rides for 661 kms. If he rides for 8 hours at a speed of 31 km/hr, find at what speed he travels for the remaining 7 hours of the journey?

A) 50 km/hr B) 42 km/hr
C) 53 km/hr D) 59 km/hr
 
Answer & Explanation Answer: D) 59 km/hr

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Q:

19 personswentto a hotel for a combineddinner party. 13 of them spent Rs 79 each on their dinner and the rest spent Rs 4 more than the average expenditure of all the 19. What was the total money spent by them?

A) 1628.4 B) 1534
C) 1492 D) None of these
 
Answer & Explanation Answer: D) None of these

Explanation:

Let the average expenditure of 19 people be x

⇒19x = 13 X 79 + 6 X (x+4)⇒19x = 13 X 79 + 6x +24

⇒x = 80.84

So, total money spent by them = 1536.07

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Q:

Each question contains Quantity I and Quantity II. Read the contents clearly and answer your questions accordingly.

Quantity I: 3 years ago the ratio of age of A and B is 3: 4 after 2 years the sum of their ages is 45. Then find the present age of A? 

Quantity II: 5 years ago, the ratio of age of p and Q id 3: 4 P’s age after 6 years is equal to the present age of Q. the find the present age of P?

 

 

A) Quantity I > Quantity II B) Quantity I ≥ Quantity II
C) Quantity I < Quantity II D) Quantity I < Quantity II
 
Answer & Explanation Answer: C) Quantity I < Quantity II

Explanation:

Quantity I= Let 3 year ago the age of A and B be 3x and 4x respectively

Then ATQ 3x+5+4x+5=45 X=5

Hence present age of A=3x+3=18year

Quantity II== Let 5 year ago the age of p and q be 3x and 4x respectively 

Then ATQ 

3x+11=4x+5 

X=6 Hence present age of P=3x+5=23

Hence Quantity I < Quantity II

 

 

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Q:

The average age of 19 boys in a class is 21 years. If the teacher's age is included, the average increases to 22 years. What is the teacher's age?

A) 39 years B) 41 years
C) 40 years D) 44 years
 
Answer & Explanation Answer: B) 41 years

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Q:

If a taxi going at 40 km/hr takes 25 minutes to travel a certain distance, by how much should it increase its speed (in km/hr) to travel the same distance in 20 minutes?

A) 50 B) 5
C) 25 D) 10
 
Answer & Explanation Answer: D) 10

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