Data Sufficiency Questions and Answers Pdf - 1

Question: 1

Each question given below has a problem and two statements numbered I and II giving certain information. You have to decide if the information given in the statements is sufficient for answering the problem. Indicate your answer as
(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.
(e) if the data in both the statements together are needed.
Who is the father of M?
I. A and B are brothers.
II. B's wife is sister of M's wife.

(A) If the data even in both the statements together are not sufficient to answer the question.

(B) If the data in both the statements together are needed.

(C) If the data in statement II alone are sufficient answer the question.

(D) If the data in statement I alone are sufficient to answer the question.

Ans: A

From II, we conclude that B is the brother-in-law of M. So, even from both the statements, we can't find out who is the father of M.

Question: 2

How is D related to A?
I. B is the brother of A.
II. B is D's son.

(A) If the data even in both the statements together are not sufficient to answer the question.

(B) If the data in both the statements together are needed.

(C) If the data either in I or II alone are sufficient to answer the question.

(D) If the data in statement II alone are sufficient answer the question.

Ans: B

From both the statements together, we find that D is the father of B and B is the brother of A. So, D is the father of A. Thus both the given statements are needed.

Question: 3

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 Rs. 2500.

(A) If the data in both the statements together are needed.

(B) If the data even in both the statements together are not sufficient to answer the question.

(C) If the data either in I or II alone are sufficient to answer the question.

(D) If the data in statement II alone are sufficient answer the question.

Ans: A

From both the given statements, we find that :
Praveen's salary = 115% of (90% of Rs 2500) = Rs 2587.50.
So, both I and II are required.

Question: 4

On which day in January, Subhas left for Germany?
I. Subha's has so far spent 10 years in Germany.
II. Subha's friend Anil left for Germany on 15th February and joined Subha's 20 days after Subha's arrival.

(A) If the data in both the statements together are needed.

(B) If the data either in I or II alone are sufficient to answer the question.

(C) If the data even in both the statements together are not sufficient to answer the question.

(D) If the data in statement I alone are sufficient to answer the question.

Ans: C

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

Question: 5

A, B, C, D and E are sitting in a row. B is between A and E. Who among them is in the middle?
I. A is left of B and right of D.
II. C is at the right end.

(A) If the data even in both the statements together are not sufficient to answer the question.

(B) If the data either in I or II alone are sufficient to answer the question.

(C) If the data in both the statements together are needed.

(D) If the data in statement I alone are sufficient to answer the question.

Ans: C

Clearly, we have the order : A, B, E.
From I, we have the order : D, A, B, E.
From II, we get the complete sequence as D, A, B, E, C.
Clearly, B is in the middle.
So, both I and II are required.

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