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Data Sufficiency - General Inteligence & Reasoning MCQ Questions and Answers

Learn Data Sufficiency mcq questions and answers with easy and logical explanations - Data Sufficiency is part of competitive reasoning mcq questions. Page-9 section-1

81
Question : How is R related to M ?

Statements :
I. M's brother is husband of P.
II. P is mother of R's sister.
Discuss
Answer & Solution
Answer: Option D
Solution:
From II, we conclude that P is R's mother.
From I, we conclude that M is the brother or sister of P's husband, who is also R's father. Thus, R is either nephew or niece of M.
82
Question : How is M related to N ?

Statements :
I. B is the daughter of M and sister of Q.
II. N is the son of K who is B's grandfather.
Discuss
Answer & Solution
Answer: Option D
Solution:
From II, we know that N is K's son and K is B's grandfather. Thus, N is the son of B's grandfather i.e. N is either father or uncle of B.
From I, B is the daughter of M. So, M is either father or mother of B.
Clearly, the correct relationship between M and N cannot be deduced.
83
Question : How many girls are taller than Shravan in his class ?

Statements :
I. When students of Shravan's class are ranked in descending order of their heights, Shravan's rank is 17th from the top among all the students and 12th among boys.
II. Shravan's rank from the bottom on the basis of height among boys is 18th and among all students, 29th.
Discuss
Answer & Solution
Answer: Option A
Solution:
From I, we conclude that there are 16 students and 11 boys taller than Shravan.
This implies that there are 5 girls taller than Shravan.
In II, Shravan's rank from the bottom is mentioned and to ascertain the number of girls taller than him, we need to know his rank from the top for which the number of students in the class is required, which is not given.
84
Question : What is Suman's rank from the top in a class of forty students ?

Statements :
I. Suman is 3 ranks below Deepak from the top.
II. Deepak's rank from the bottom is 23.
III. Suman is 3 ranks above Deepak from the bottom.
Discuss
Answer & Solution
Answer: Option E
Solution:
From II, we conclude that in a class of 40, Deepak ranks 23rd from the bottom i.e. 18th from the top.
From I and II, we find that Suman is 3 ranks below 18th rank from the top i.e. she ranks 21st from the top.
From II and III, we find that Suman is 3 ranks above 23rd rank from the bottom
i.e. she ranks 20th from the bottom or 21st from the top.
85
Question : Five persons - A, B, C, D and E are sitting in a row. Who is sitting in the middle?

Statements :
I. B is between E and C.
II. B is to the right of E.
III. D is between A and E.
Discuss
Answer & Solution
Answer: Option D
Solution:
From I, the order is : E, B, C or C, B, E.
From II, the order is : E, B.
From III, the order is : A, D, E.
Combining the above three, we get the order as : A, D, E, B, C. Clearly, E is sitting in the middle.
86
Question : How is 'DATE' written in the code language ?

Statements :
I. DEAR is written as $#@? in that code.
II. TREAT is written as %?#@% in that code.
III. TEAR is written as %#@? in that code.
Discuss
Answer & Solution
Answer: Option D
Solution:
Observing I, II and III, we find that similar letters have similar code symbols at the corresponding places in the code. So, this is direct-coding.
Thus, to find the code for DATE, we need the code for D which can be obtained from I only (i.e. $.) and the codes for A, T and E which can be obtained either from II or III (@, # and % respectively).
87
Question : In which year was Sanjay born ?

Statements :
I. Sanjay is six years older than Gopal.
II. Gopal's brother was born in 1982.
III. Sanjay's brother is two years younger than Gopal's brother who was eight years younger than Gopal.
Discuss
Answer & Solution
Answer: Option D
Solution:
From II, we know that Gopal's brother was born in 1982.
From III, we find that Gopal's brother was 8 years younger to him i.e. Gopal was born in 1974.
From I, we find that Sanjay is 6 years older than Gopal. Thus, Sanjay was born in 1968.
88
Question : Who among Siddhartha, Nikunj, Vipul and Mukul is the youngest?

Statements :
I. Vipul is younger than Mukul but older than Siddhartha and Nikunj.
II. Mukul is the oldest.
III. Siddhartha is older than Nikunj.
Discuss
Answer & Solution
Answer: Option D
Solution:
From I, we have: M > V, V > S, V > N ...(i)
From II, we have: Mukul is the oldest ...(ii)
From III, we have: S > N ...(iii)
Combining (i) and (iii), we get :M > V, V >S > N or M>V > S > N. Clearly, Nikunj is the youngest.
89
Question : In a certain code, 'XYZ' means 'We are friends'. Which letter stands for 'We' ?

Statements :
I. 'PYN' means 'They are classmates'.
II. 'ZMS' means 'We love them'.
III. 'PX' means 'Hello friends'.
Discuss
Answer & Solution
Answer: Option E
Solution:
To find the code for 'we', we need to have any of the following:
(i) 'We are friends' should have only 'We' common with another statement, as in II;
(ii) 'We are friends' should have only 'are' and 'friends' common with another single or two statements, as in I and III. Thus, we need Either II only or I and III only.
90
Question : Among P, Q, R, S and T, Q is the second tallest and S is immediate taller than the shortest. Who among them is in the middle when they stand in the order of their heights ?

Statements :
I. T is not the shortest.
II. R is taller than S but shorter than Q.
III. P ranks third in height above S when all are arranged in the order of height.
Discuss
Answer & Solution
Answer: Option B
Solution:
From the given statement, the descending order of heights is :__, Q,__, S,__.
From II, we have the order: _, Q, R, S,__. Thus, R is in the middle.
From III, we have the order : P, Q,__, S,__. But, according to I, T is not the shortest.
So, R is the shortest. Thus, we have the order : P, Q, T, S, R. So, T is in the middle.