Aptitude and Reasoning Questions

Q:

The series of differences between consecutive prime numbers is represented as Cp1, Cp2, Cp3, .... Cpn , Whare Cp1 is the difference between the second and the first prime number. Find the sum of series when n = 23, given that the 23rd prime number is 83 ? 

A) 87 B) 81
C) 83 D) 85
 
Answer & Explanation Answer: A) 87

Explanation:

Cp1 = p2 - p1 ,
Cp2 = p3 - p2
..
..
..
Cp23 = p24 - p23
Sum of series = (p2-p1) + (p3-p2) + .....(p23-p22) + (p24-p23)
All terms get cancelled, except p1 = 2 and p24 = 89
So Sum = -p1 + p24
Sum of series = -2 + 89 = 87

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Filed Under: Problems on Numbers
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Q:

Introducing a boy Rahul says, "He is the son of the brother of the only daughter of my maternal grandfather". How is the boy related to the Rahul?

A) Grandfather B) Son
C) Cousin / Brother D) Father
 
Answer & Explanation Answer: C) Cousin / Brother

Explanation:
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Filed Under: Blood Relations
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Q:

Find the least number to be added to 1739 so that it is exactly divisible by 11.

A) 11 B) 2
C) 1 D) 10
 
Answer & Explanation Answer: D) 10

Explanation:
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Filed Under: Problems on Numbers
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Q:

Choose the set of figures which follows the given rule.

Rule: Any figure can be traced by a single unbroken line without retracting.

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

Explanation:
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Filed Under: Rule Detection

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Q:

The difference between present ages of Ravali and Swarna is 9 years. After 7 years, Ravali’s age is twice of Swarna’s age. What will be Ravali’s age after 4 years?

A) 15 yrs B) 16 yrs
C) 20 yrs D) 21 yrs
 
Answer & Explanation Answer: A) 15 yrs

Explanation:

Let the present age of Ravali = x

=> Swarna's present age = x - 9

From the given data,

x + 7 = 2(x - 9 + 7)

=> x = 11 yrs

Required Ravali's age after 4 years = 11 + 4 = 15 yrs.

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Filed Under: Problems on Ages
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Q:

Consider the given argument and decide which of the given assumptions is/are implicit.

Argument :
All girls love reading novels.

Assumptions :
1. Novels are the only reading materials.
2. No girl loves to read other materials.

 

A) Both assumptions 1 and 2 are implicit B) Only assumption 1 is implicit
C) Neither assumption 1 nor 2 is implicit D) Only assumption 2is implicit
 
Answer & Explanation Answer: C) Neither assumption 1 nor 2 is implicit

Explanation:
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Filed Under: Statement and Assumptions
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Q:

There are six persons A, B, C, D E and F. C is the sister of F. B is the brother of E's husband. D is the father of A and grandfather of F. There are two fathers, three brothers and a mother in the group. Who is E's husband ? 

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

Explanation:

D is father of A and grandfather of F. So, A is father of F. 

Thus. D and A are the two fathers. C is the sister of F So. C is the daughter of A. 

Since there is only one mother, it is evident that E is the wife of A and hence the mother of C and F. 

So, B is brother of A There are three brothers. So. F is the brother of C.

A is E's husband

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Q:

Ramesh, Kamal, Mohit, Amit and Rohit are standing in a row in the order of their heights. Ramesh is shorter than Kamal but taller than Rohit. Mohit is the tallest. Amit is a little shorter than Kamal but little taller than Ramesh. Who is the shortest?

A) Amit B) Mohit
C) Rohit D) Kamal
 
Answer & Explanation Answer: C) Rohit

Explanation:
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Filed Under: Arithmetical Reasoning
Exam Prep: Bank Exams

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