GMAT Data Sufficiency (DS) Forum - Free Practice Questions

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

Bunuel

25 Oct 2022, 08:11

176

15

78,794

by: thisisakr

16 Apr 2026, 11:46

ER

100 Hardest and easiest questions for DS as of March 2026

1, 2

Bunuel

01 Jan 2026, 05:45

856

24

188,570

by: bumpbot

16 Sep 2025, 06:05

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DS Question Directory by Topic and Difficulty

bb

29 Aug 2025, 13:27

1.5k

0

487,998

by: bb

29 Aug 2025, 13:27

ER

During a particular period, water enters a partially filled reservoir

Sub 505 (Easy) | Work and Rate Problems

Sub 505 (Easy) | Work and Rate Problems hide tags

Bunuel

20 Mar 2016, 10:52

4

5

9,998

by: bumpbot

29 Mar 2021, 21:07

ER

During a particular period, water enters a partially filled reservoir

Sub 505 (Easy) | Distance and Speed Problems

Sub 505 (Easy) | Distance and Speed Problems hide tags

Bunuel

03 Sep 2024, 01:30

2

3

1,203

by: Krunaal

03 Sep 2024, 14:08

ER

During a one day sale, a store sold each sweater of a certain type for

505-555 (Easy) | Word Problems

505-555 (Easy) | Word Problems hide tags

netcaesar

12 Dec 2018, 05:06

114

17

44,602

by: bumpbot

08 Mar 2025, 08:25

ER

During a holiday Mr. & Mrs. Harry went to a hill station named 'Wings

505-555 (Easy) | Overlapping Sets

505-555 (Easy) | Overlapping Sets hide tags

Bunuel

01 Aug 2024, 01:30

1

1,188

by: siddhantvarma

19 Sep 2024, 10:49

ER

During a five-day period, Monday through Friday, the average

555-605 (Medium) | Statistics and Sets Problems

555-605 (Medium) | Statistics and Sets Problems hide tags

Bunuel

24 Sep 2024, 01:30

5

6

2,356

by: Bunuel

13 Dec 2024, 01:01

ER

During a five day charity drive, the least amount of money raised in

605-655 (Medium) | Word Problems

605-655 (Medium) | Word Problems hide tags

Bunuel

13 Sep 2024, 01:30

6

3

1,838

by: pierjoejoe

13 Oct 2024, 01:33

ER

During a certain year, what fraction of the 32 million union

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

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

honey86

07 May 2014, 01:46

20

5

11,149

by: bumpbot

10 Sep 2025, 13:34

ER

During a certain GMAT marathon, the average blood pressure of female

605-655 (Medium) | Mixture Problems

605-655 (Medium) | Mixture Problems hide tags

GMATNinja

18 Apr 2022, 22:45

27

2

5,130

by: bumpbot

02 Jan 2025, 21:17

ER

During a certain game, after each turn, a player’s points are doubled

805+ (Hard) | Word Problems

805+ (Hard) | Word Problems hide tags

Bunuel

21 Aug 2018, 20:54

45

10

8,170

by: bumpbot

07 Mar 2025, 03:12

ER

During a certain football season, Tom, Bela, and Amanda each scored at

605-655 (Medium) | Word Problems

605-655 (Medium) | Word Problems hide tags

Bunuel

29 Sep 2025, 21:00

5

4

801

by: Souradeep17

30 Sep 2025, 11:34

ER

During a certain election, each of the voters votes to candidates X

555-605 (Medium) | Overlapping Sets

555-605 (Medium) | Overlapping Sets hide tags

Bunuel

19 Nov 2024, 01:30

1

745

by: cdrectenwald

19 Nov 2024, 06:30

ER

During a certain day, a bookshop sold 100 used books and 50 new books.

555-605 (Medium) | Word Problems

555-605 (Medium) | Word Problems hide tags

Bunuel

02 Sep 2022, 05:35

1

1,247

by: sanjitscorps18

02 Sep 2022, 06:21

ER

During a certain bicycle ride, was Sherry's average speed faster than

505-555 (Easy) | Distance and Speed Problems

505-555 (Easy) | Distance and Speed Problems hide tags

RSOHAL

23 Dec 2015, 21:03

86

12

29,239

by: bumpbot

16 Jan 2026, 04:12

ER

During a baseball game, a pitcher threw a total of 40 pitches, some of

705-805 (Hard) | Percent and Interest Problems

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

Bunuel

06 Dec 2024, 01:30

4

2

1,251

by: krish0709

13 Dec 2024, 12:36

ER

During a 7-year period the profits of Midas, Inc. changed by

555-605 (Medium) | Percent and Interest Problems

555-605 (Medium) | Percent and Interest Problems hide tags

ankithakhu

28 Mar 2010, 01:57

19

12

7,084

by: bumpbot

13 May 2024, 10:25

ER

During a 6·day local trade show, the least number of people

555-605 (Medium) | Word Problems

555-605 (Medium) | Word Problems hide tags

Walkabout

13 Dec 2012, 07:42

115

8

25,144

by: totaltestprepNick

04 Mar 2026, 10:52

ER

During a 5 year period, the profits of Company Z changed by what

555-605 (Medium) | Percent and Interest Problems, Word Problems

555-605 (Medium) | Percent and Interest Problems, Word Problems hide tags

stowaway

10 Jan 2021, 23:29

3

1,459

by: rocky620

11 Jan 2021, 05:41

ER

During a 40-mile trip, Marla traveled at an average speed of

605-655 (Medium) | Distance and Speed Problems

605-655 (Medium) | Distance and Speed Problems hide tags

LM

27 Apr 2010, 09:55

429

18

75,911

by: bumpbot

20 Mar 2026, 01:30

ER

During a 10-week summer vacation, was the average (arithmetic mean)

655-705 (Hard) | Word Problems

655-705 (Hard) | Word Problems hide tags

vaivish1723

20 Nov 2023, 08:18

100

14

27,709

by: bumpbot

30 Jan 2026, 03:53

ER

During 1996, 17,500 patients were admitted to Warehall Hospital, and

655-705 (Hard) | Fractions and Ratios, Word Problems

655-705 (Hard) | Fractions and Ratios, Word Problems hide tags

Bunuel

28 Apr 2025, 00:30

6

3

1,225

by: Abhiswarup

29 Apr 2025, 00:12

ER

DS questions about standard deviation

605-655 (Medium) | Statistics and Sets Problems

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

1, 2, 3

Bunuel

27 Oct 2009, 16:36

208

52

88,601

by: Bunuel

24 Nov 2019, 02:45

ER

DS Prep resources

555-605 (Medium) | Algebra +2 tags

555-605 (Medium) | Algebra, Fractions and Ratios, Math Related hide tags

miag

07 Jan 2026, 06:04

1

0

236

by: miag

07 Jan 2026, 06:04

ER

Drug Y is the active ingredient in medicine M. Jeff and Zach are being

505-555 (Easy) | Word Problems

505-555 (Easy) | Word Problems hide tags

Bunuel

23 Jun 2021, 03:00

2

999

by: GMATWhizTeam

25 Jun 2021, 04:41

ER

Driving at their respective constant speeds along the same route,

655-705 (Hard) | Distance and Speed Problems

655-705 (Hard) | Distance and Speed Problems hide tags

mbaguy2025

03 Dec 2023, 06:03

125

9

14,021

by: Bunuel

14 Sep 2025, 12:01

ER

Doug found that he had gained mass since he last measured it

555-605 (Medium) | Word Problems

555-605 (Medium) | Word Problems hide tags

ExpertsGlobal5

12 Feb 2026, 20:00

3

405

by: ExpertsGlobal5

15 Feb 2026, 10:00

ER

Does z = y(x+1)/x^2 ? (1) x^2z = y (2) y/x = 0

655-705 (Hard) | Algebra

655-705 (Hard) | Algebra hide tags

Bunuel

06 Oct 2021, 01:30

3

5

2,744

by: chetan2u

06 Nov 2021, 05:30

ER

Does z = 3 ? (1) z is a solution of z^2 − 2z − 3 = 0. (2) z is a solu

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

Bunuel

11 Jul 2019, 01:56

1

2

1,086

by: Archit3110

11 Jul 2019, 10:25

ER

Does z = 3 ?

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

Bunuel

28 May 2017, 01:52

4

14

2,615

by: ArjunJag1328

17 Sep 2018, 04:30

ER

Does y equal 1 ? (1) x = 2y (2) x = 2

Sub 505 (Easy) | Algebra

Sub 505 (Easy) | Algebra hide tags

Bunuel

23 May 2020, 05:49

1

4

2,193

by: bumpbot

10 Dec 2023, 08:11

ER

Does y = ax^2 + bx + c intersect the x-axis?

605-655 (Medium) | Coordinate Plane

605-655 (Medium) | Coordinate Plane hide tags

Bunuel

26 May 2023, 03:30

3

1

1,132

by: gmatophobia

26 May 2023, 14:08

ER

Does xy = 1? (1) x > y (2) x = 1/y

Sub 505 (Easy) | Algebra, Inequalities

Sub 505 (Easy) | Algebra, Inequalities hide tags

Bunuel

11 Feb 2020, 02:30

11

6

9,270

by: bumpbot

26 Feb 2023, 16:25

ER

Does xy = 0 ? (1) x = y (2) 2x = 0

Sub 505 (Easy) | Algebra

Sub 505 (Easy) | Algebra hide tags

Bunuel

23 May 2020, 04:17

1

2

3,272

by: v12345

22 Jul 2020, 09:19

ER

Does x=22? (1) Ten percent of x is 2.2. (2) One eleventh of x is an

505-555 (Easy) | Number Properties, Percent and Interest Problems

505-555 (Easy) | Number Properties, Percent and Interest Problems hide tags

Bunuel

16 Jan 2023, 02:30

1

1,240

by: gmatophobia

16 Jan 2023, 13:03

ER

Does x/n(s^2 + n^2 + t^2) = xn + yt + zs?

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

Bunuel

04 Jul 2022, 22:00

1

978

by: priyabaheti

10 Jul 2022, 07:24

ER

Does x^2 = y ? (1) y^(1/2) = -x (2) x < y

Sub 505 (Easy) | Inequalities

Sub 505 (Easy) | Inequalities hide tags

jlgdr

07 Sep 2023, 00:36

4

4,230

by: Bunuel

06 Sep 2023, 23:54

ER

Does x^2 + px + q = 0 have a root? (1) p < 0 (2) q < 0

605-655 (Medium) | Algebra

605-655 (Medium) | Algebra hide tags

Bunuel

12 May 2023, 03:30

2

1,297

by: TheBipedalHorse

13 May 2023, 06:26

ER

Does x^2 + 4x + 4 = 10?

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

Bunuel

06 Jan 2017, 02:53

5

2,145

by: BloomingLotus

29 Jan 2017, 11:28

ER

Does x^2 - y^2 = x + y ? (1) x and y are consecutive integers. (2) x

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

Bunuel

22 Nov 2022, 02:30

5

4

953

by: gmatophobia

22 Nov 2022, 09:05

ER

Does x^2 - y^2 = x + y ? (1) x and y are consecutive integers (2) x

555-605 (Medium) | Algebra, Number Properties

555-605 (Medium) | Algebra, Number Properties hide tags

Bunuel

19 Sep 2022, 06:38

1

1,188

by: GMATinsight

19 Sep 2022, 06:44

ER

Does x have at least 3 prime factors? (1) x = 5b, where b is a positiv

605-655 (Medium) | Number Properties

605-655 (Medium) | Number Properties hide tags

Bunuel

05 Mar 2019, 05:21

2

5

1,676

by: Bunuel

02 Sep 2025, 06:09

Does x equal -2?

555-605 (Medium) | Algebra, Inequalities

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

EthanTheTutor

09 Jun 2022, 01:30

2

1

874

by: EthanTheTutor

09 Jun 2022, 01:33

Does x equal -2?

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

EthanTheTutor

09 Jun 2022, 01:39

2

1

935

by: EthanTheTutor

09 Jun 2022, 01:43

ER

Does x = y? (1) z = u (2) ABCD is a parallelogram

655-705 (Hard) | Geometry

655-705 (Hard) | Geometry hide tags

Bunuel

17 Oct 2017, 23:42

4

4,595

by: bumpbot

28 May 2020, 01:02

ER

Does x = y? (1) x^2 - y^2 = 0 (2) (x - y)^2 = 0

505-555 (Easy) | Algebra

505-555 (Easy) | Algebra hide tags

Schawjibb

15 Oct 2013, 09:36

3

6,767

by: bumpbot

24 Jan 2023, 08:21

ER

Does x = y? (1) BD is perpendicular to AC. (2) AB is equal to BC.

555-605 (Medium) | Geometry

555-605 (Medium) | Geometry hide tags

Bunuel

17 Oct 2017, 23:43

4

4,036

by: Plunkster82

23 Oct 2017, 18:14

ER

Does x = y? (1) |x| = |y| (2) x^2 = y^2

Sub 505 (Easy) | Absolute Values

Sub 505 (Easy) | Absolute Values hide tags

GMATBusters

01 Nov 2018, 08:10

26

3

8,645

by: bumpbot

27 Feb 2025, 15:00

ER

Does x = y?

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

Bunuel

31 Jan 2016, 08:23

2

4

2,594

by: Donnie84

03 Feb 2016, 19:52

ER

Does x = y ? (1) xy/(x + y) = 0 (2) xy = 0

655-705 (Hard) | Algebra

655-705 (Hard) | Algebra hide tags

Bunuel

22 Jan 2022, 10:41

22

4

5,066

by: bumpbot

12 Jul 2024, 06:28

ER

Does x = y ? (1) x^2 = y^2 (2) |x| = |y|

Sub 505 (Easy) | Absolute Values

Sub 505 (Easy) | Absolute Values hide tags

apoorvpan

08 May 2012, 00:46

16

7

8,004

by: bumpbot

17 Apr 2022, 03:10

ER

Does x = y ? (1) The average of x and 1/x equals the average of y and

655-705 (Hard) | Algebra

655-705 (Hard) | Algebra hide tags

Bunuel

22 Jul 2019, 01:59

4

2

1,240

by: Archit3110

22 Jul 2019, 10:59