Aptitude and Reasoning Questions

Q:

If farmers want to improve their yield, they must use organic fertilizers in place of chemical fertilizers.

Assumptions: 

I. Chemical fertilizers have certain ill effects on health 

II. Chemical fertilizers do not produce as much yield as the organic fertilizers.

A) If only assumption I is Implicit B) If only assumption II is Implicit
C) If either I or II is Implicit D) If both I and II are Implicit
 
Answer & Explanation Answer: B) If only assumption II is Implicit

Explanation:

I is not implicit because health is not the focus of the statement. II is implicit in the very need for substitution.

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Q:

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 4 or 15 ?

A) 6/19 B) 3/10
C) 7/10 D) 6/17
 
Answer & Explanation Answer: B) 3/10

Explanation:

Here, S = {1, 2, 3, 4, ...., 19, 20}=> n(s) = 20
Let E = event of getting a multiple of 4 or 15
=multiples od 4 are {4, 8, 12, 16, 20}
And multiples of 15 means multiples of 3 and 5
= {3, 6 , 9, 12, 15, 18, 5, 10, 15, 20}.
= the common multiple is only (15).
=> E = n(E)= 6
Required Probability = P(E) = n(E)/n(S) = 6/20 = 3/10.

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Filed Under: Probability
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Q:

Choose the word which is least like the others word in a group?

A) Mechanic B) Blacksmith
C) Engineer D) Mason
 
Answer & Explanation Answer: A) Mechanic

Explanation:

All except Mechanic help in building a house.

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Filed Under: Classification

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Q:

Select the option that will correctly fit in the blank space in the given figure.

 

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

Explanation:
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Filed Under: Pattern Completion
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Q:

The office building needs repairing just as urgently as it needs internal as well as external painting

Assumptions:

1. Efficiency of people working in the office cannot be improved unless office building is reapaire

2. Repairing and painting of office building require funds

A) Only 1 is true B) Only 2 is true
C) Either 1 or 2 is true D) Neither 1 nor 2 is true
 
Answer & Explanation Answer: D) Neither 1 nor 2 is true

Explanation:

Nothing can be deduced regarding the effect of reapirs of office building on efficency of workers,or the requirement of funds for repairs,from the given statement.So,neither 1 nor 2 is true

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Filed Under: Statement and Assumptions
Exam Prep: GRE

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Q:

What percent is 120 of 85 ?

A) 133.33 % B) 141.17 %
C) 145.54 % D) 139.29 %
 
Answer & Explanation Answer: B) 141.17 %

Explanation:

Px85100=120

 

=> p = 12000/85 = 141.17 %

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Filed Under: Percentage
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Q:

A box contains 5 green, 4 yellow and 5 white pearls. Four pearls are drawn at random. What is the probability that they are not of the same colour ?

A)  11/91

B)  4/11

C)  1/11

D) 90/91

A) Option A B) Option B
C) Option C D) Option D
 
Answer & Explanation Answer: D) Option D

Explanation:

Let S be the sample space. Then,
n(s) = number of ways of drawing 4 pearls out of 14


= C414 ways = 14×13×12×114×3×2×1= 1001


Let E be the event of drawing 4 pearls of the same colour.
Then, E = event of drawing (4 pearls out of 5) or (4 pearls out of 4) or (4 pearls out of 5)

  C15+ C44+ C15 = 5+1+5 =11

 P(E) = n(E)n(S)=111001=191  

 

 Required probability = 1-191=9091

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Filed Under: Permutations and Combinations
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Q:

Physiology :Biology :: Metaphysics : ?

A) Physics B) Statistics
C) Mathematics D) Philosophy
 
Answer & Explanation Answer: D) Philosophy

Explanation:

Physiology is a branch of biology. Similarly, mathematics is a branch of philosophy.

 

Hence, Physiology : Biology :: Metaphysics : Philosophy.

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Filed Under: Analogy
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