Aptitude and Reasoning Questions

Q:

Two cones have their heights in the ratio 1:3 and the radii of their bases in the ratio 3:1. Find the ratio of their volumes.

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

Explanation:

v1v2=r12Hr22H

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Filed Under: Volume and Surface Area
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28 14967
Q:

Some children goto ice-cream shop. 9 flavours are available there. Each child takes a cone with two different flavours. No two children take same combination and they have taken all such possible combinations. How many children went to ice cream shop ?

A) 28 B) 56
C) 44 D) 36
 
Answer & Explanation Answer: D) 36

Explanation:

Given there are 9 flavours of ice creams.

 

Each child takes the combination of two flavours and no two children will have the same combination

 

This can be done by  ways i.e children.

 

Number of children=C29  = 9 x 8 / 1x 2 = 36.

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Filed Under: Permutations and Combinations
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4 14965
Q:

Should all the factories in the cities be shifted to the outskirts, far away from the main city?

Arguments :

I. Yes. This is an essential step for controlling pollution in the city.

II. No. Such a step will lead to lot of inconvenience to the employees of the factories and their families as well

A) If only argument I is strong B) If only argument II is strong
C) If neither I nor II is strong D) If both I and II are strong
 
Answer & Explanation Answer: A) If only argument I is strong

Explanation:

I is strong because pollution control is highly desirable. II is weak. There may be some inconvenience initially but in fact their families would live better lives in the outskirts.

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5 14963
Q:

The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is :

A) 15 B) 20
C) 21 D) data inadequate
 
Answer & Explanation Answer: D) data inadequate

Explanation:

 Clearly, to find the average, we ought to know the number of boys, girls or students in the class, neither of which has been given.

So, the data provided is inadequate.

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Filed Under: Average

18 14954
Q:

Refer the below data and answer the following question.

If 400 calories are burned by jogging 5 km, how many calories were burnt in the given week?

A) 990 calories B) 1090 calories
C) 1040 calories D) 940 calories
 
Answer & Explanation Answer: C) 1040 calories

Explanation:
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Filed Under: Table Charts
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0 14944
Q:

Refer the below data and answer the following question.

What was the increase in the height of the child from 8th Birthday to 16th birthday?

A) 70 cms B) 75 cms
C) 60 cms D) 65 cms
 
Answer & Explanation Answer: D) 65 cms

Explanation:
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Filed Under: Table Charts
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0 14943
Q:

Which is the correct ascending order of the given numbers?

 

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

Explanation:
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Filed Under: Problems on Numbers
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1 14941
Q:

The altitude drawn to the base of an isosceles triangle is 8 cm and the perimeter is 32 cm. Find the area of the triangle.

A) 24 B) 48
C) 60 D) 72
 
Answer & Explanation Answer: B) 48

Explanation:

Let ABC be the isosceles triangle and AD be the altitude 

Let AB = AC = x. Then, BC = (32 - 2x). 

Since, in an isosceles triangle, the altitude bisects the base,
so BD = DC = (16 - x).
In triangle ADC,AC2=AD2+DC2 

x2=82+16-x2x=10 

BC = (32- 2x) = (32 - 20) cm = 12 cm. 

Hence, required area =  12*BC*AD=12*12*8=48cm2

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Filed Under: Area
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11 14937