Logical Reasoning Data Sufficiency Questions for Competitive exams Sep 22 2015

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Logical Reasoning Topic of the day: Data Sufficiency

Data sufficiency questions are asked in most competitive and bank exams.  A Data Sufficiency question consists of a mathematical or logical question and two statements, numbered I and II given below it.  You have to decide whether the problem can be solved by using the information from the given statements individually or combined or not at all .  The answers are

(a) if the data in statement I alone is sufficient to answer the question, while the data in statement II alone is not sufficient to answer the question.

(b) if the data in statement II alone is sufficient to answer the question, while Ihe data in statement I alone is not sufficient to answer the question.

(c) if the data either in statement I alone or in statement II alone is sufficient to answer the question.

(d) if the data In the statements I and II together are not sufficient to answer the question.

(e) it the data in both the statements I and II together are necessary to answer the question.

The trick to solving Data Sufficiency problems is:

1) Read the given statements. Remember not to assume anything except universal facts.

2) Don’t  solve the question. In Data Sufficiency, just ask yourself whether the question could be solved with the information given in the statements. These questions are not supposed to involve long and drawn-out calculations. However if you still find yourself doing a lot of calculations, there is certainly something you’re not seeing.

3) Now use the first statement and combine it with main statement. If you get the answer answer is first statement is sufficient to answer the question.

3) If first statement is not sufficient to find the answer, then take the second statement individually and combine with the main statement. If you can get the answer then answer is second statement alone is sufficient to answer the question.

4) After verifying that both statements individually aren’t enough to find an answer then combine both statements with main statement and check whether you find the answer. If you manage to get the answer then option is both statements combined are sufficient to answer the question.

5) If still you can’t find the answer, then both statements are insufficient.

Attempt the following questions to check your level of preparedness for data sufficiency questions in competitive exams. You can answer the questions in comments section. Also make sure you checkout tomorrow’s update for solutions to these questions along with the formulae used in VIDEO format by our Subject Expert.

 

Question 1 : In a certain code language, ‘297’ means ‘tie clip button’. Which number means ‘button’ ?

I. In that language ‘926’ means ‘clip your tie’.

II. In that language ‘175’ means ‘hole and button’.

A) If statements I is sufficient to answer the question, but statement II by itself is not sufficient to answer the question.
B) If statement II by itself is sufficient to answer the question, but statement I alone is not sufficient to answer the question.
C) If statement either I or II is sufficient to answer the question.
D) If both the statements I and II taken together are sufficient to answer the question. If both the statements I and II taken together are not sufficient to answer the question.
E) If both the statements I and II taken together are not sufficient to answer the question.

Question 2: In which direction is Ravi facing?

I. Asok is to the right of Ravi

II. Samir is sitting opposite of Asok facing north.

A) If statements I is sufficient to answer the question, but statement II by itself is not sufficient to answer the question.
B) If statement II by itself is sufficient to answer the question, but statement I alone is not sufficient to answer the question.
C) If statement either I or II is sufficient to answer the question.
D) If both the statements I and II taken together are sufficient to answer the question. If both the statements I and II taken together are not sufficient to answer the question.
E) If both the statements I and II taken together are not sufficient to answer the question.

Question 3: Six persons P, Q, R, S, T and V are sitting around a table. Who is sitting opposite to S?

I. R is not sitting opposite to S.

II. P is sitting opposite Q.

A) If statements I is sufficient to answer the question, but statement II by itself is not sufficient to answer the question.
B) If statement II by itself is sufficient to answer the question, but statement I alone is not sufficient to answer the question.
C) If statement either I or II is sufficient to answer the question.
D) If both the statements I and II taken together are sufficient to answer the question. If both the statements I and II taken together are not sufficient to answer the question.
E) If both the statements I and II taken together are not sufficient to answer the question.

Question 4: In a family of 5 people. How is Tanya related to Dhruv?

I. Rakesh is father-in-law of Tanya and Dhruv is son of Tanya.

II. Dhruv’s sister is Payal who is Kapil’s daughter. Dhruv is grandson of Rakesh.

A) If statements I is sufficient to answer the question, but statement II by itself is not sufficient to answer the question.
B) If statement II by itself is sufficient to answer the question, but statement I alone is not sufficient to answer the question.
C) If statement either I or II is sufficient to answer the question.
D) If both the statements I and II taken together are sufficient to answer the question. If both the statements I and II taken together are not sufficient to answer the question.
E) If both the statements I and II taken together are not sufficient to answer the question.
VIDEO SOLUTIONS FOR September 21 Seating Arrangement QUESTIONS:

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