GMAT Data Sufficiency (DS) Forum - Free Practice Questions

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Complete 1000 GMAT Data Sufficiency Series (DS-1000 Series) Questions

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Bunuel

25 Oct 2022, 08:11

189

15

89,245

by: thisisakr

16 Apr 2026, 11:46

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100 Hardest and easiest questions for DS as of June 2026

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1, 2

Bunuel

01 Jan 2026, 05:45

872

24

194,331

by: bumpbot

16 Sep 2025, 06:05

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DS Question Directory by Topic and Difficulty

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bb

23 Aug 2026, 13:03

1.6k

1

496,497

by: bb

23 Aug 2026, 13:01

ER

For each landscaping job that takes more than 4 hours, a certain

655-705 (Hard) | Word Problems

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1, 2

mrsmarthi

08 Oct 2009, 17:15

259

21

43,415

by: bumpbot

06 Jan 2026, 21:23

ER

If 20x + 30y = 280, what is the value of x?

555-605 (Medium) | Algebra

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Bunuel

06 Oct 2015, 06:01

5

8,572

by: bumpbot

06 Jan 2026, 21:01

ER

What percent of y is x? (1) y is 10 more than x divided by 2. (2) The

605-655 (Medium) | Fractions and Ratios, Percent and Interest Problems

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Bunuel

24 May 2018, 06:33

5

2

4,786

by: bumpbot

06 Jan 2026, 19:05

ER

Greg and Brian are both at Point A (above). Starting at the

655-705 (Hard) | Distance and Speed Problems

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ghostdude

12 Jul 2013, 01:36

107

17

23,676

by: bumpbot

06 Jan 2026, 19:02

ER

In a certain city, the ratio of the number of people who purchase news

705-805 (Hard) | Percent and Interest Problems, Word Problems

705-805 (Hard) | Percent and Interest Problems, Word Problems hide tags

Bunuel

10 Dec 2018, 03:36

51

11

11,535

by: Utkarsha20

06 Jan 2026, 14:59

ER

Beginning at noon yesterday, water was added to a partially filled

655-705 (Hard) | Word Problems

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guddo

19 Dec 2023, 11:11

84

11

14,922

by: bumpbot

06 Jan 2026, 11:42

A biotechnology student is performing an experiment in which he is try

605-655 (Medium) | Work and Rate Problems

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Bunuel

29 Dec 2021, 06:30

12

3

3,021

by: bumpbot

06 Jan 2026, 11:39

ER

Jim, painting alone for 8 hours, completes painting part of

555-605 (Medium) | Work and Rate Problems

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gmatquant25

04 Jun 2013, 15:49

9

2

4,375

by: bumpbot

06 Jan 2026, 11:35

ER

Set K consists of a finite number of consecutive odd

705-805 (Hard) | Statistics and Sets Problems

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Economist

25 Oct 2009, 01:13

31

11

10,961

by: Vivek1707

06 Jan 2026, 11:01

Simon has P different toys in a bag. If he discards Q toys, then in

705-805 (Hard) | Combinations

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Bunuel

09 Sep 2024, 01:30

21

9

3,549

by: bumpbot

06 Jan 2026, 10:41

If Tom's age is 5 years less than the combined ages of Dick and Harry

705-805 (Hard) | Word Problems

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Bunuel

05 Nov 2019, 06:04

13

5

7,492

by: pappal

06 Jan 2026, 10:40

How many Mondays are in December of a particular year?

705-805 (Hard) | Word Problems

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Bunuel

22 Jan 2016, 10:34

3

7,918

by: bumpbot

06 Jan 2026, 10:38

ER

What is the value of x?

555-605 (Medium) | Algebra, Roots

555-605 (Medium) | Algebra, Roots hide tags

shrive555

04 Nov 2010, 18:22

103

13

14,327

by: bumpbot

06 Jan 2026, 10:09

ER

An insurance company sells only one type of health and one type of

605-655 (Medium) | Word Problems

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Bunuel

06 Jan 2026, 09:12

13

7

7,266

by: Bunuel

06 Jan 2026, 09:57

ER

What is the value of X in the above list of 7 numbers?

505-555 (Easy) | Statistics and Sets Problems

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gmatt1476

21 Sep 2019, 15:55

33

8

13,808

by: bumpbot

06 Jan 2026, 09:12

ER

In what year was Ellen born?

555-605 (Medium) | Word Problems

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vix

17 Mar 2012, 18:51

64

5

17,750

by: bumpbot

06 Jan 2026, 09:07

ER

If x ≠ 1, is y equal to x + 1? (1) (y-2)/(x-1)=1 (2) y^2=(x+1)^2

505-555 (Easy) | Algebra

505-555 (Easy) | Algebra hide tags

gmatt1476

21 Sep 2019, 17:31

59

7

14,521

by: bumpbot

06 Jan 2026, 08:42

ER

If (x + y)/z > 0, is x < 0?

555-605 (Medium) | Inequalities

555-605 (Medium) | Inequalities hide tags

mojorising800

09 Jun 2010, 12:01

56

5

10,836

by: bumpbot

06 Jan 2026, 08:35

ER

What is the standard deviation of Set A, which has 9 terms? 1) All di

605-655 (Medium) | Statistics and Sets Problems

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GMATinsight

02 Mar 2025, 01:59

4

5

2,149

by: bumpbot

06 Jan 2026, 08:34

If x, y, and z are consecutive integers and x < y < z, is y an even

605-655 (Medium) | Number Properties

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Bunuel

06 Jan 2023, 02:30

5

3

1,570

by: bumpbot

06 Jan 2026, 05:58

A box contains red and blue balls only. If there are 8 balls in total

705-805 (Hard) | Probability

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Bunuel

15 Oct 2024, 01:30

10

5

2,672

by: bumpbot

06 Jan 2026, 05:43

ER

In a classroom, 40% of the boys had read a particular book. What was

605-655 (Medium) | Overlapping Sets, Probability

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Bunuel

13 Mar 2020, 01:16

15

8

5,313

by: bumpbot

06 Jan 2026, 02:26

ER

A director is deciding how to cast a play from a pool of 50

705-805 (Hard) | Combinations

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blueseas

22 Apr 2013, 14:00

34

8

8,524

by: bumpbot

06 Jan 2026, 01:02

ER

If p,q and r are positive numbers, does q lie between p and r on the

705-805 (Hard) | Number Properties

705-805 (Hard) | Number Properties hide tags

pushpitkc

21 Sep 2017, 00:25

70

9

12,302

by: bumpbot

06 Jan 2026, 01:00

Mr. Thomas gave a chemistry test to 25 students and assigned each stud

555-605 (Medium) | Statistics and Sets Problems

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Bunuel

21 Feb 2023, 02:00

1

2

3,857

by: bumpbot

05 Jan 2026, 23:22

No wonder Federer lost in his Olympic tennis final, he

805+ (Hard) | Arithmetic, Word Problems

805+ (Hard) | Arithmetic, Word Problems hide tags

EvaJager

06 Aug 2012, 06:46

12

13

4,605

by: bumpbot

05 Jan 2026, 22:46

ER

Data Sufficiency Pack 4, Question 3) On a number line...

705-805 (Hard) | Absolute Values, Number Properties

705-805 (Hard) | Absolute Values, Number Properties hide tags

EMPOWERgmatRichC

20 Nov 2015, 15:23

9

4

4,307

by: bumpbot

05 Jan 2026, 22:28

ER

Working independently at their respective constant rates, machines X

Sub 505 (Easy) | Work and Rate Problems

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Bunuel

25 Feb 2020, 03:26

10

5

6,339

by: bumpbot

05 Jan 2026, 13:12

ER

Do at least 20 percent of the people in country X who are over the age

655-705 (Hard) | Word Problems

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Bunuel

22 Jun 2022, 07:00

4

6

2,982

by: Bunuel

05 Jan 2026, 11:58

If m is an integer greater than 9 but less than 20, is n greater than

705-805 (Hard) | Statistics and Sets Problems

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Bunuel

06 Dec 2019, 05:36

9

3

3,078

by: bumpbot

05 Jan 2026, 09:58

ER

The table above shows the results of a survey of 100 voters who each r

805+ (Hard) | Overlapping Sets

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Nayyar29

12 Jun 2024, 23:55

31

3

5,697

by: bumpbot

05 Jan 2026, 09:53

Committees X, Y and Z have at least three members each. No two of thes

805+ (Hard) | Statistics and Sets Problems

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PKN

11 Aug 2018, 04:51

7

2,439

by: bumpbot

05 Jan 2026, 09:48

ER

In each of the last five years, Company K donated p percent of its

Sub 505 (Easy) | Percent and Interest Problems

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Bunuel

16 Jun 2016, 03:49

65

12

28,146

by: bumpbot

05 Jan 2026, 09:30

n = 2^4*3^2*5^2 and positive integer d is a divisor of n. Is d > n^?

555-605 (Medium) | Inequalities, Multiples and Factors

555-605 (Medium) | Inequalities, Multiples and Factors hide tags

gmatt1476

21 Sep 2019, 19:31

76

8

16,295

by: bumpbot

05 Jan 2026, 07:43

ER

Is x^2 - y^2 > 0? (1) x^2 - y^2 > x - y (2) x^2 - y^2 < x + y

805+ (Hard) | Inequalities

805+ (Hard) | Inequalities hide tags

BillyZ

21 Mar 2017, 18:52

29

11

8,702

by: Vivek1707

05 Jan 2026, 06:40

ER

All of the m men and w women who were members of club G last year are

705-805 (Hard) | Percent and Interest Problems

705-805 (Hard) | Percent and Interest Problems hide tags

user22020

17 Feb 2024, 23:04

94

13

12,074

by: bumpbot

05 Jan 2026, 06:16

ER

How many 4 member committee can be formed from a group of x men and y

705-805 (Hard) | Combinations

705-805 (Hard) | Combinations hide tags

Bunuel

12 Jan 2022, 06:30

14

7

4,808

by: bumpbot

05 Jan 2026, 06:01

ER

A and B are two sets containing the elements shown above

655-705 (Hard) | Statistics and Sets Problems

655-705 (Hard) | Statistics and Sets Problems hide tags

Bunuel

28 Jun 2022, 01:30

7

10

2,261

by: NIKKtheSolver33

05 Jan 2026, 05:45

ER

A health club charges an annual $10 renewal fee for all memb

605-655 (Medium) | Word Problems

605-655 (Medium) | Word Problems hide tags

avohden

02 Oct 2013, 10:10

22

13

6,800

by: bumpbot

05 Jan 2026, 02:24

ER

Are the integers x, y and z consecutive?

605-655 (Medium) | Statistics and Sets Problems

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Bunuel

11 May 2016, 03:19

9

5

15,313

by: bumpbot

05 Jan 2026, 02:16

ER

An antiques dealer purchased three cabinets at three distinc

705-805 (Hard) | Percent and Interest Problems

705-805 (Hard) | Percent and Interest Problems hide tags

daviesj

03 Jan 2013, 05:22

49

8

10,960

by: AditiDeokar

05 Jan 2026, 01:18

ER

The Department of Environmental Protection measured the volume of wate

605-655 (Medium) | Statistics and Sets Problems

605-655 (Medium) | Statistics and Sets Problems hide tags

akhil911

14 Feb 2021, 03:10

75

10

10,972

by: bumpbot

05 Jan 2026, 00:42

By what percent was the price of a certain candy bar increased?

Sub 505 (Easy) | Percent and Interest Problems

Sub 505 (Easy) | Percent and Interest Problems hide tags

Bunuel

03 Oct 2018, 00:41

5

15,658

by: bumpbot

05 Jan 2026, 00:19

ER

The cost to charter a certain airplane is x dollars. If the 25 members

Sub 505 (Easy) | Word Problems

Sub 505 (Easy) | Word Problems hide tags

Bunuel

29 Jun 2022, 01:16

31

6

10,891

by: Bunuel

04 Jan 2026, 22:47

ER

If $ represents a digit in the 7-digit number 3,62$,215, what is the

555-605 (Medium) | Fractions and Ratios, Word Problems

555-605 (Medium) | Fractions and Ratios, Word Problems hide tags

Bunuel

11 Dec 2014, 07:08

50

6

15,127

by: Bunuel

04 Jan 2026, 22:40

ER

Is a < b? (1) |a – b| = b – a (2) a/b < 1

705-805 (Hard) | Algebra, Inequalities

705-805 (Hard) | Algebra, Inequalities hide tags

mahdwen

04 Jun 2017, 14:20

10

2,820

by: bumpbot

04 Jan 2026, 22:21

ER

If x, y, b and t are all positive integers, x = y/5 + 2

655-705 (Hard) | Number Properties

655-705 (Hard) | Number Properties hide tags

hideyoshi

04 Sep 2015, 07:14

6

5

2,935

by: bumpbot

04 Jan 2026, 22:00

ER

The revenue through television sales for Jacy, an electronic appliance

555-605 (Medium) | Percent and Interest Problems

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ExpertsGlobal5

01 Jan 2026, 22:00

3

2

618

by: ExpertsGlobal5

04 Jan 2026, 21:15

ER

A processed coffee manufacturer sources coffee beans from precisely 3

555-605 (Medium) | Word Problems

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ExpertsGlobal5

01 Jan 2026, 22:00

1

484

by: ExpertsGlobal5

04 Jan 2026, 20:15

ER

In a class of 100 students, how many students play volleyball?

555-605 (Medium) | Overlapping Sets

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ExpertsGlobal5

31 Dec 2025, 22:00

2

615

by: ExpertsGlobal5

04 Jan 2026, 19:15