Data Sufficiency Questions

Q:

How is B related to A ? 

I. A is B's sister. 

II. is the father of A and B. 

A) If the data in statement I alone are sufficient to answer the question B) If the data in statement II alone are sufficient answer the question
C) If the data either in I or II alone are sufficient to answer the question; D) If the data even in both the statements together are not sufficient to answer the question
 
Answer & Explanation Answer: D) If the data even in both the statements together are not sufficient to answer the question

Explanation:

From statements I and II together, we can conclude only that either B is the sister or brother of A.

So, even from both the statements, the exact relation cannot be known. 

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Q:

How many sons does D have ?  

I. A's father has three children. 

II. B is A's brother and son of D. 

A) If the data in statement I alone are sufficient to answer the question B) If the data in statement II alone are sufficient answer the question
C) If the data either in I or II alone are sufficient to answer the question; D) If the data even in both the statements together are not sufficient to answer the question
 
Answer & Explanation Answer: D) If the data even in both the statements together are not sufficient to answer the question

Explanation:

From both I and II together, we can conclude that A and B are the children of D, but the sex of A and the third child of D is not known. So, both the statements together are also not sufficient to answer the question. 

 

 

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Q:

Rohit, 'Kajal, Tanmay and Suman are four friends. Who is the oldest among them ? 

I. The total age of Kajol and Tanmay together is more than that of Suman. 

II. The total age of Rohit and Kajol together is less than that of Suntan. 

A) If the data in statement I alone are sufficient to answer the question B) If the data in statement II alone are sufficient answer the question
C) If the data either in I or II alone are sufficient to answer the question; D) If the data even in both the statements together are not sufficient to answer the question
 
Answer & Explanation Answer: D) If the data even in both the statements together are not sufficient to answer the question

Explanation:

From given statements, we find that K + T > S and R - K <S.

Thus. who is oldest is not known  

 

 

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Q:

Who is C's partner in a game of cards involving four players A. B, C and D ? 

I. D is sitting opposite to A. 

II. B is sitting right of A and left of D. 

A) If the data in statement I alone are sufficient to answer the question B) If the data in statement II alone are sufficient answer the question
C) If the data either in I or II alone are sufficient to answer the question; D) If the data even in both the statements together are not sufficient to answer the question
 
Answer & Explanation Answer: C) If the data either in I or II alone are sufficient to answer the question;

Explanation:

Clearly, each of the given statements shows that B is sitting opposite to C or B is the partner of C. 

 

 

 

 

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Q:

On which day in January, Subhas left for Germany ? 

I. Subhas has so far spent 10 years in Germany. 

II. Subhas friend Anil left for Germany on 15th February and joined Subhas 20 days after Subhass arrival. 

A) If the data in statement I alone are sufficient to answer the question B) If the data in statement II alone are sufficient answer the question
C) If the data either in I or II alone are sufficient to answer the question; D) If the data even in both the statements together are not sufficient to answer the question
 
Answer & Explanation Answer: D) If the data even in both the statements together are not sufficient to answer the question

Explanation:

Clearly, even from both the given statements, we cannot conclude the exact date of Subhas leaving for Germany. . 

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Q:

What is the monthly salary of Praveen ? 

I. Praveen gets 15% more than Sumit while Sumit gets 10% less than Lokesh.

II. Lokesh's monthly salary is Its 2500. 

A) If the data in statement I alone are sufficient to answer the question B) If the data in statement II alone are sufficient answer the question
C) If the data either in I or II alone are sufficient to answer the question; D) If the data in both the statements together are needed.
 
Answer & Explanation Answer: D) If the data in both the statements together are needed.

Explanation:

From both the given statements, we find that : Praveen's salary s 115% of (90% of Rs 2500) = Rs 2587.50

So, both I and II are required. 

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Q:

How many sons does X have ? 

I. Q and U are brothers of T. 

II. R is sister of P and U. 

III. R and T are daughters of X. 

A) I and 11 only B) I, II and III together
C) II and III together D) I, II and III together are not sufficient
 
Answer & Explanation Answer: D) I, II and III together are not sufficient

Explanation:

The information given in the three statements together is also not sufficient to answer the given question. 

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Q:

In which year was Sanjay born ? 

I. Sanjay is six years older than Gopal.

II. Gopal's brother was born in 1982.

III. Sanjay's brother as two years younger than Gopal's brother who was eight years younger than Gopal. 

A) I and II together B) II and III together
C) I and III together D) I, II and III together
 
Answer & Explanation Answer: D) I, II and III together

Explanation:

From II, we know that Copal's brother was born in 1982. From III, we find that Gopal's brother was 8 years younger to him i.e. Copal was born in 1974. From I, we find that Sanjay is 6 years older than Gopal Thus. Sanjay was born in 1968. So. all the three statements are required. 

 

 

 

 

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