# GMAT Data Sufficiency Process of Elimination Tips: How to Complete DS Questions in Less than One and Half Minutes

Once GMAT test takers have learned about the fundamental concepts tested in the exam, focus should be on saving time for each question. In GMAT, each question should be answered in just under two minutes. Data sufficiency follows a format where a question is followed by two statements, labeled as (1) and (2), and five answer choices in the format:

a) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked.

b) Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked.

c) BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked.

e) Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.

Process of Elimination techniques will allow you to complete the GMAT DS questions in less than one and half minutes.

Let us consider a few scenarios:

Statement 1 is insufficient:
When Statement 1 is insufficient; you can eliminate two answer choices: A and D.

Statement 2 is insufficient: When Statement 2 is insufficient; you can eliminate two answer choices: B and D.

Out of the five answer choices, the probability of getting C or E correct is 40%, while getting A, B or D correct is 60%. Therefore, the chances that only one statement will contribute in finding the correct answer choices is 20% higher than the instance where both the statements are used. Keep that in mind, and if you have read our article about how test creators force us to believe that Answer Choice C is the best option, you will start with statement 2, instead of statement 1.

Let us look at an example:

ABCD is a quadrilateral with parallel sides. Is ABCD a rectangle?

(1) AC and BD bisects each other
(2) Sum of <DAB and <BCD is less than 180 degree.

1) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked.

2) Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked.

3) BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked.

5) Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.

First, you need to know the properties of a rectangle:

a) Each Angle is 90 Degrees
b) Sum of Opposite Angles is equal to 180 Degree
c) Opposite Sides are Parallel to each other
d) Opposite Sides are Equal
e) Diagonals bisect each other

ABCD is a quadrilateral with parallel sides. Is ABCD a rectangle?

(1) AC and BD bisects each other
(2) Sum of <DAB and <BCD is less than 180 degree.

a) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer  the question asked.

b) Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked.

c) BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked.

e) Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.

Let us start with Statement (2), as mentioned in our GMAT DS Strategy article.

Statement 2: Sum of <DAB and <BCD is less than 180 degree

Since <DAB and <BCD are opposite angles of the quadrilateral, and the sum is less than 180 degree, it is not a rectangle. When Statement 2 is insufficient, we can eliminate options B and D.

Statement 1: AC and BD bisects each other

We know that Statement 1 is not enough since in a parallelogram the two diagonals bisect each other too.

If we combine the two statements, it becomes clear that ABCD is not a rectangle.

1. Complete GMAT RC Questions in less than 1 minute and 50 seconds
3. Take Notes Effectively
4. Collect and Interpret Facts
5. Speed up Summary Creation
6. Remember Information
7. Question the Author

12. Learn to Answer GMAT organization of passage Question
13. Learn to identify the style/tone or attitude of the author

Mastering GMAT Critical Reasoning

After you read F1GMAT’s Mastering GMAT Critical Reasoning Guide, you will learn:

How to overcome flawed thinking in GMAT Critical Reasoning?

How to spot Inconsistencies in Arguments

How to eliminate out of scope answer choices using Necessary and Sufficient Conditions

How to Paraphrase GMAT Critical Reasoning Question

How to Answer Assumption Question Type

How to Answer Conclusion Question Type

How to Answer Inference Question Type

How to Answer Strengthen Question Type

How to Answer Weaken Question Type

How to Answer bold-faced and Summary Question Types

How to Answer Parallel Reasoning Questions

How to Answer the Fill in the Blanks Question

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