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GMAT Data Sufficiency — practice questions

Explore 27 free Data Sufficiency questions in GMAT Data Insights. Open each question or exercise to read its content, reference answers and available explanation.

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Data Sufficiency questions and exercises with answers

Showing questions 1–27 of 27.

GMAT · Quantitativeaptitude · Data Sufficiency — T/FRead the answer and worked solution →Is integer n positive? (1) n^2 > n. (2) n^3 > n.Read the answer and worked solution →What is the value of x? (1) x is an even prime. (2) x^2 = 4.Read the answer and worked solution →Is x + y > 10? (1) x > 5. (2) y > 5.Read the answer and worked solution →Is x positive? (1) x > −3 (2) x is evenRead the answer and worked solution →What is the value of x? (1) x + 3 = 7 (2) x is oddRead the answer and worked solution →Is n divisible by 6? (1) n is divisible by 2 (2) n is divisible by 3Read the answer and worked solution →Is x² > x? (1) x > 1 (2) x is integerRead the answer and worked solution →Is x > y? (1) x − y = 3 (2) x + y = 5Read the answer and worked solution →Is the product mn positive? (1) m > 0 (2) n > 0Read the answer and worked solution →What is the value of x/y? (1) x = 2y (2) x + y = 6Read the answer and worked solution →Is x an integer? (1) 2x is an integer (2) x² is an integerRead the answer and worked solution →Value of x when x² − 4 = 0? (1) x is positive (2) x is integerRead the answer and worked solution →Is ab > 0? (1) a > b (2) a and b same signRead the answer and worked solution →Is x + y > 10? (1) x > 5 (2) y > 5Read the answer and worked solution →Is z negative? (1) z² = 9 (2) z < 0Read the answer and worked solution →What is x + y? (1) x = 4 (2) x + 2y = 10Read the answer and worked solution →Is the integer p prime? (1) p has exactly 2 divisors (2) p > 2Read the answer and worked solution →Value of x in 5x − 10 = 0? (1) x is rational (2) 5x = 10Read the answer and worked solution →Are the lines perpendicular? (1) Slopes are m and −1/m (2) Slopes are 2 and −1/2Read the answer and worked solution →Is the rectangle a square? (1) Perimeter = 20 (2) All sides equalRead the answer and worked solution →Are sets A and B disjoint? (1) A ∩ B = ∅ (2) A and B nonemptyRead the answer and worked solution →Is 1/x > 1? (1) x is positive (2) x < 1Read the answer and worked solution →Match each GMAT Data Sufficiency standard option letter with its sufficiency condition:Read the answer and worked solution →Match each remaining Data Sufficiency option letter with its outcome:Read the answer and worked solution →Match each GMAT Focus Data Insights question type with its analytical demand:Read the answer and worked solution →Match each Data Insights two-part analysis model with its solving strategy:Read the answer and worked solution →

Worked practice questions

GMAT · Quantitativeaptitude · Data Sufficiency — T/F

Read exercise and reference answers
Questions
  1. Statement is true
    Yes
    Statement
    DS Statement (1) alone is sufficient if it gives a unique answer.
  2. Statement is true
    Yes
    Statement
    If both (1) and (2) are independently sufficient, the answer is D.
  3. Statement is true
    Yes
    Statement
    If neither alone is sufficient but together they are, the answer is C.
  4. Statement is true
    Yes
    Statement
    DS answer E means 'cannot be determined even together'.
  5. Statement is true
    No
    Statement
    In DS you must actually calculate the value to answer.
  6. Statement is true
    Yes
    Statement
    DS questions test whether you have enough information, not the number itself.
Instructions
Decide each Data Sufficiency rule.

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Is integer n positive? (1) n^2 > n. (2) n^3 > n.

  1. Statement (1) ALONE is sufficient, (2) is not.
  2. Statement (2) ALONE is sufficient, (1) is not.
  3. BOTH statements TOGETHER are sufficient; neither alone.
  4. EACH statement ALONE is sufficient.
  5. (1) and (2) TOGETHER are NOT sufficient.
Show answer and solution

Correct answer: B. Statement (2) ALONE is sufficient, (1) is not.

1. Identify what is being asked: this is a **Data Sufficiency** question. 2. Apply the standard approach for this question type to evaluate each option. 3. The correct answer is **B. Statement (2) ALONE is sufficient, (1) is not.** — it satisfies the conditions of the stem. _Source: GMAT Focus DI Question Format Guide (examhunter.net)_

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What is the value of x? (1) x is an even prime. (2) x^2 = 4.

  1. Statement (1) ALONE is sufficient, (2) is not.
  2. Statement (2) ALONE is sufficient, (1) is not.
  3. BOTH statements TOGETHER are sufficient; neither alone.
  4. EACH statement ALONE is sufficient.
  5. (1) and (2) TOGETHER are NOT sufficient.
Show answer and solution

Correct answer: A. Statement (1) ALONE is sufficient, (2) is not.

1. Identify what is being asked: this is a **Data Sufficiency** question. 2. Apply the standard approach for this question type to evaluate each option. 3. The correct answer is **A. Statement (1) ALONE is sufficient, (2) is not.** — it satisfies the conditions of the stem. _Source: GMAT Focus DI Question Format Guide (examhunter.net)_

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