The GMAT Data Sufficiency questions, which fall under the Data Insights section of the GMAT Focus exam, are like intriguing puzzles that challenge your ability to decide whether the information given is enough to answer a specific question. In this blog, we’ll provide you with some GMAT Data Sufficiency questions and their answers to help you grasp these unique challenges.

In this blog:

1. GMAT Data Sufficiency Practice Questions
2. Tips to Ace GMAT Data Sufficiency Questions 
3. Conclusion

GMAT Data Sufficiency Practice Questions

Question 1: 

If n = m^2 – 6m + 9, what is the value of m?

(1) n = 0
(2) m + n = 3

1. Statement (1) ALONE is Sufficient but Statement (2) ALONE is not sufficient.
2. Statement (2) ALONE is sufficient but statement (1) ALONE is not sufficient.
3. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
4. EACH statement ALONE is sufficient.
5. Statements (1) and (2) TOGETHER are not sufficient.

Answer: A

Question 2:

The selling price of an article is equal to the cost of the article plus the markup. The markup on a certain refrigerator is what percent of the selling price?

(1) The markup on the refrigerator is 25 percent of the cost.
(2) The selling price of the refrigerator is $250.

1. Statement (1) alone is sufficient, but statement (2) alone is not sufficient.
2. Statement (2) alone is sufficient, but statement (1) alone is not sufficient.
3. Both statements together are sufficient, but neither statement alone is sufficient.
4. Each statement alone is sufficient.
5. Statements (1) and (2) together are not sufficient.

Answer: A

Question 3:

K is a set of n consecutive positive integers. Is the mean of the set a positive integer?
(1) the range of K is an even integer
(2) the median of K is a positive integer

1. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
2. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
3. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
4. EACH statement ALONE is sufficient.
5. Statements (1) and (2) TOGETHER are not sufficient.

Answer: D

Question 4:

What is y?
(1) |y|
(2) |y| = 3y – 2

1. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
2. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
3. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
4. EACH statement ALONE is sufficient.
5. Statements (1) and (2) TOGETHER are not sufficient.

Answer: B

Question 5:

Does the equation y = (x – m)(x – n) intercept the x-axis at the point (2,0)?
(1) mn = -8
(2) -2 – m = n

1. Statement (1) ALONE is sufficient but statement (2) ALONE is not sufficient.
2. Statement (2) ALONE is sufficient but statement (1) ALONE is not sufficient.
3. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
4. EACH statement ALONE is sufficient.
5. Statements (1) and (2) TOGETHER are not sufficient.

Answer: C

Question 6:

From a group of P employees, Q will be selected, at random, to sit in a line of Q chairs. There are absolutely no restrictions, either in the selection process nor in the order of seating — both are entirely random. What is the probability that the employee Mathew is seated somewhere to the right of employee Hillary?

Statement #1: Q = 15
Statement #2: Q = P

1. Statement 1 ALONE is sufficient to answer the question, but statement 2 alone is NOT sufficient.
2. Statement 2 ALONE is sufficient to answer the question, but statement 1 alone is NOT sufficient.
3. BOTH statements 1 and 2 TOGETHER are sufficient to answer the question, but NEITHER statement ALONE is sufficient.
4. Each statement ALONE is sufficient to answer the question.
5. Statement 1 and 2 TOGETHER are NOT sufficient to answer the question.

Answer: B

Also read: GMAT Data Insights Section

Tips to Ace GMAT Data Sufficiency Questions

Here are 5 GMAT Data Sufficiency tips to tackle the tricky questions: 

1. Avoid Complex Calculations: The GMAT doesn’t require heavy math; instead, make informed judgments using provided data. Avoid excessive calculator use.
2. Systematic Approach: Develop a structured strategy. Evaluate statement (1) and (2) separately before combining them.
3. Critical Thinking: Be alert for tricky GMAT tactics and pitfalls in questions. Don’t be easily deceived.
4. Practice: Regular practice enhances pattern recognition and quick decision-making.
5. Time Management: Data Sufficiency questions can be time-consuming; don’t dwell on a single question. If it’s too tricky, move on and return later if possible.

Also read: Inside GMAT’s Quant, Verbal and Data Insights sections

Conclusion

Begin by grasping the question’s essence and what it is demanding on the GMAT’s Data Insights section. Scrutinise each statement individually, considering the given data and any constraints. Decide if each statement alone provides a complete answer. If not, assess whether combining the statements results in a clear solution. 

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