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

189

15

89,001

by: thisisakr

16 Apr 2026, 11:46

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100 Hardest and easiest questions for DS as of June 2026

1, 2

Bunuel

01 Jan 2026, 05:45

872

24

194,221

by: bumpbot

16 Sep 2025, 06:05

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DS Question Directory by Topic and Difficulty

Guides & Resources

Guides & Resources hide tags

bb

23 Aug 2026, 13:03

1.6k

1

496,162

by: bb

23 Aug 2026, 13:01

ER

Set S contains five different positive integers a, b, c, d, and e, whe

805+ (Hard) | Statistics and Sets Problems

805+ (Hard) | Statistics and Sets Problems hide tags

Raksat

07 Aug 2018, 10:32

19

11

3,735

by: bumpbot

25 Aug 2026, 10:17

ER

A research project has a successful outcome if its research is

705-805 (Hard) | Non-Math Related

705-805 (Hard) | Non-Math Related hide tags

1, 2

GMATinsight

26 May 2024, 02:12

164

23

12,895

by: ModernPine

25 Aug 2026, 08:00

ER

In a certain year, the difference between Mary's and Jim's annual sala

655-705 (Hard) | Arithmetic, Word Problems

655-705 (Hard) | Arithmetic, Word Problems hide tags

1, 2

alimad

15 Jul 2019, 04:53

423

36

68,156

by: bumpbot

24 Aug 2026, 21:30

In the Reagan High School swim club, 120 members swim the backstroke

555-605 (Medium) | Overlapping Sets

555-605 (Medium) | Overlapping Sets hide tags

Bunuel

23 Aug 2026, 19:00

5

3

241

by: madsb18

24 Aug 2026, 11:06

ER

The symbol Ω represents one of the following operations: add

555-605 (Medium) | Algebra +2 tags

555-605 (Medium) | Algebra, Arithmetic, Functions and Custom Characters hide tags

ROckHIsT

29 Dec 2013, 03:38

58

8

16,426

by: bumpbot

24 Aug 2026, 10:04

ER

How many hours would it take Pump A and Pump B working together, each

555-605 (Medium) | Work and Rate Problems

555-605 (Medium) | Work and Rate Problems hide tags

AbdurRakib

01 Jul 2016, 04:45

342

15

58,964

by: shwetakoshija

24 Aug 2026, 09:18

ER -1

Robs latest meal contained 660 calories, derived from either protein

805+ (Hard) | Word Problems

805+ (Hard) | Word Problems hide tags

Bunuel

01 Apr 2025, 00:30

9

3

2,365

by: bumpbot

24 Aug 2026, 07:01

ER

Last year 3/5 of the members of a certain club were males. This year

805+ (Hard) | Fractions and Ratios

805+ (Hard) | Fractions and Ratios hide tags

1, 2

Carcass

27 Jul 2017, 08:17

581

24

50,044

by: chetan2u

24 Aug 2026, 05:45

ER

Superfast train A leaves Newcastle for Birmingham at 3 PM and travels

805+ (Hard) | Distance and Speed Problems

805+ (Hard) | Distance and Speed Problems hide tags

Bunuel

06 Apr 2015, 07:46

74

8

13,320

by: bumpbot

24 Aug 2026, 04:40

ER

Five coffee-chicory blends - J, K, L, M, and N - are all priced

655-705 (Hard) | Non-Math Related +2 tags

655-705 (Hard) | Non-Math Related, Statistics and Sets Problems, Word Problems hide tags

GMATCoachBen

06 Feb 2024, 18:30

174

10

16,111

by: agil31

24 Aug 2026, 04:14

ER

If a positive decimal d has 7 nonzero digits, is d > 100 ?

555-605 (Medium) | Number Properties

555-605 (Medium) | Number Properties hide tags

Bunuel

15 Sep 2020, 07:15

12

3

4,483

by: Rishab2409

23 Aug 2026, 23:34

ER

It takes 10 type A machines 3 days to complete a task when they are op

505-555 (Easy) | Work and Rate Problems

505-555 (Easy) | Work and Rate Problems hide tags

Bunuel

07 Feb 2020, 06:20

37

12

12,148

by: ohhno

23 Aug 2026, 23:15

ER

The research funds of a certain company were divided among three depar

Sub 505 (Easy) | Word Problems

Sub 505 (Easy) | Word Problems hide tags

Bunuel

24 Jun 2018, 20:47

43

13

22,874

by: ohhno

23 Aug 2026, 23:14

On Thursday afternoon, two machines, J and R, ran continuously at unif

655-705 (Hard) | Work and Rate Problems

655-705 (Hard) | Work and Rate Problems hide tags

Bunuel

18 Apr 2017, 03:49

12

9

4,267

by: bumpbot

23 Aug 2026, 12:34

ER

Everyday, last week, John commuted form his house office along the

655-705 (Hard) | Distance and Speed Problems

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

Bunuel

31 Dec 2024, 01:30

6

2

2,007

by: bumpbot

23 Aug 2026, 12:14

ER

At a community center, 360 people enrolled in at least one of two week

555-605 (Medium) | Overlapping Sets

555-605 (Medium) | Overlapping Sets hide tags

Bunuel

23 Jun 2026, 19:00

6

678

by: Bunuel

23 Aug 2026, 08:27

Erin writes a list of every sixth integer in increasing order, startin

805+ (Hard) | Multiples and Factors +2 tags

805+ (Hard) | Multiples and Factors, Number Properties, Word Problems hide tags

Bunuel

06 Apr 2022, 08:00

13

2

3,155

by: bumpbot

23 Aug 2026, 04:54

ER

The nth term of a sequence of distinct positive integers is determined

655-705 (Hard) | Sequences

655-705 (Hard) | Sequences hide tags

Bunuel

18 Mar 2020, 09:19

9

4

4,450

by: bumpbot

23 Aug 2026, 02:43

ER

Is the standard deviation of numbers x, y, and z, positive?

655-705 (Hard) | Statistics and Sets Problems

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

Bunuel

24 Aug 2026, 05:11

36

6

5,768

by: bumpbot

22 Aug 2026, 22:24

ER

A person bought x number of apples, y number of oranges, and z number

705-805 (Hard) | Word Problems

705-805 (Hard) | Word Problems hide tags

guddo

14 Aug 2024, 08:55

52

4

7,224

by: MrMaxMan

22 Aug 2026, 12:40

ER

GMAT Club World Cup 2022 (DAY 1): A poll conducted in a football club

805+ (Hard) | Overlapping Sets

805+ (Hard) | Overlapping Sets hide tags

Bunuel

11 Jul 2022, 08:00

46

9

9,132

by: bumpbot

22 Aug 2026, 12:19

ER

All boxes in a certain warehouse were arranged in stacks of 12 boxes

705-805 (Hard) | Word Problems

705-805 (Hard) | Word Problems hide tags

baharalipour

28 Apr 2016, 09:46

472

18

52,389

by: bumpbot

22 Aug 2026, 03:39

ER

GMAT Club World Cup 2026 (Day 6): To board the Tokyo flight, any

805+ (Hard) | Non-Math Related

805+ (Hard) | Non-Math Related hide tags

1, 2, 3, 4

Bunuel

13 Jul 2026, 08:00

68

76

1,699

by: msing454

22 Aug 2026, 00:24

ER

Is 10 – 6x < 0 ?

655-705 (Hard) | Inequalities

655-705 (Hard) | Inequalities hide tags

nidhi12

04 Jun 2014, 07:53

7

16

5,539

by: dhart

21 Aug 2026, 23:17

ER

A jewelry dealer initially offered a bracelet for sale at an

705-805 (Hard) | Word Problems

705-805 (Hard) | Word Problems hide tags

vageesh

11 Jan 2010, 06:11

232

9

29,472

by: bumpbot

21 Aug 2026, 22:48

ER

A university awarded grants in the amount of either $7,000 or $10,000

655-705 (Hard) | Word Problems

655-705 (Hard) | Word Problems hide tags

Bunuel

18 Aug 2026, 19:00

4

2

449

by: MarkGMATMentor

21 Aug 2026, 19:44

ER

Of the 9,000 people who voted in a recent election, how many women

555-605 (Medium) | Percent and Interest Problems

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

Bunuel

18 Aug 2026, 19:00

1

3

391

by: Bunuel

21 Aug 2026, 11:45

ER

A college admissions committee will grant a certain number

605-655 (Medium) | Combinations

605-655 (Medium) | Combinations hide tags

nverma

12 Apr 2010, 13:56

311

19

37,113

by: Bunuel

21 Aug 2026, 11:15

In the figure above, lines l1 and l2 are parallel. What is the value

Sub 505 (Easy) | Geometry

Sub 505 (Easy) | Geometry hide tags

Bunuel

19 Oct 2019, 03:38

1

5

11,647

by: Bunuel

21 Aug 2026, 10:49

ER

Poetry books make up what percent of the books on Beths bookshelf?

Sub 505 (Easy) | Word Problems

Sub 505 (Easy) | Word Problems hide tags

Bunuel

20 Aug 2026, 19:00

3

263

by: counterclash1

21 Aug 2026, 10:32

ER

In a certain group of 50 people, how many are doctors who have a law

Sub 505 (Easy) | Overlapping Sets

Sub 505 (Easy) | Overlapping Sets hide tags

1, 2

Bunuel

26 Jun 2017, 02:21

150

21

33,494

by: bumpbot

20 Aug 2026, 14:29

Erin writes a list of every sixth integer in increasing order, startin

805+ (Hard) | Arithmetic, Sequences

805+ (Hard) | Arithmetic, Sequences hide tags

gmatophobia

31 Mar 2022, 09:39

26

3

3,972

by: bumpbot

20 Aug 2026, 12:03

ER

The only articles of clothing in a certain closet are shirts, dresses,

555-605 (Medium) | Word Problems

555-605 (Medium) | Word Problems hide tags

1, 2

Bunuel

16 Jun 2016, 06:05

310

20

47,555

by: bumpbot

20 Aug 2026, 10:45

ER

In a certain class of 5 students, the average (arithmetic mean) weight

655-705 (Hard) | Statistics and Sets Problems

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

Bunuel

18 Aug 2025, 09:22

30

13

10,061

by: bumpbot

20 Aug 2026, 10:08

ER

What is the value of q ? (1) q = 9^(1/2) (2) |q| = 3

505-555 (Easy) | Absolute Values +2 tags

505-555 (Easy) | Absolute Values, Number Properties, Roots hide tags

Bunuel

15 Nov 2018, 05:34

33

7

6,855

by: Bunuel

20 Aug 2026, 09:59

ER

Three different numbers have a product that is greater than

705-805 (Hard) | Inequalities +2 tags

705-805 (Hard) | Inequalities, Multiples and Factors, Word Problems hide tags

fskilnik

20 Feb 2019, 07:11

8

7

2,665

by: bumpbot

20 Aug 2026, 05:49

ER

Set A contains distinct integers: A = {2,4,6,-8,x,y}. When two numbers

805+ (Hard) | Absolute Values, Probability

805+ (Hard) | Absolute Values, Probability hide tags

Bunuel

09 Mar 2016, 12:34

43

5

7,312

by: bumpbot

20 Aug 2026, 05:05

In a company of 250 employees, each employee has at least one of two

605-655 (Medium) | Overlapping Sets

605-655 (Medium) | Overlapping Sets hide tags

Bunuel

20 Aug 2026, 04:39

2

4

428

by: Bunuel

20 Aug 2026, 04:39

ER

A certain fruit stand sells only apples for $0.26 each, bananas for $0

805+ (Hard) | Word Problems

805+ (Hard) | Word Problems hide tags

Bunuel

10 Feb 2017, 09:33

45

13

12,164

by: Garg007

20 Aug 2026, 04:18

Each of the 50 students participating in a workshop is either an under

555-605 (Medium) | Probability

555-605 (Medium) | Probability hide tags

Sallyzodiac

03 May 2016, 08:04

220

14

40,467

by: Bunuel

20 Aug 2026, 03:47

ER

If the prime numbers p and t are the only prime factors of

655-705 (Hard) | Multiples and Factors, Number Properties

655-705 (Hard) | Multiples and Factors, Number Properties hide tags

1, 2

phoenixgmat

20 Aug 2026, 10:27

189

21

30,720

by: Rishab2409

20 Aug 2026, 03:10

By what percent did the population of Belleville increase from 2001

505-555 (Easy) | Percent and Interest Problems

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

Bunuel

19 Aug 2026, 19:00

1

220

by: ShresthKhandelwal

20 Aug 2026, 00:59

ER

A comedian is playing two shows at a certain comedy club, and twice as

555-605 (Medium) | Word Problems

555-605 (Medium) | Word Problems hide tags

Sajjad1994

24 Feb 2017, 08:27

12

7

6,285

by: bumpbot

20 Aug 2026, 00:58

ER

If m and n are positive integers, is the remainder of (10^m + n)/3

805+ (Hard) | Remainders

805+ (Hard) | Remainders hide tags

zisis

24 Sep 2010, 15:11

414

19

42,270

by: Bunuel

20 Aug 2026, 00:24

If Steve owns red, blue, and green marbles in the ratio of 2 : 3 : 5

505-555 (Easy) | Fractions and Ratios, Word Problems

505-555 (Easy) | Fractions and Ratios, Word Problems hide tags

Bunuel

19 Aug 2026, 19:00

1

209

by: abhishekb1352

19 Aug 2026, 23:31

ER

If K is an integer and 2 < K < 8, what is the value of K ?

555-605 (Medium) | Multiples and Factors

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

blog

31 Jan 2008, 19:32

93

13

44,608

by: Rishab2409

19 Aug 2026, 23:07

ER

If there is a bag containing less than 30 balls, how many of them are

655-705 (Hard) | Probability, Word Problems

655-705 (Hard) | Probability, Word Problems hide tags

chetan2u

23 Nov 2017, 06:16

23

13

3,992

by: Mehta17

19 Aug 2026, 18:45

ER

Each member of a team consisting of 6 researchers and 4 assistants

605-655 (Medium) | Statistics and Sets Problems, Word Problems

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

Bunuel

28 May 2026, 12:38

18

8

1,260

by: MrMaxMan

19 Aug 2026, 15:44

ER

Set A consists of 8 distinct prime numbers. If x is equal to the range

655-705 (Hard) | Statistics and Sets Problems

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

Bunuel

11 Aug 2021, 03:30

33

7

10,613

by: bumpbot

19 Aug 2026, 10:34

ER

If 25% of the company's employees contribute at least 4% of their

605-655 (Medium) | Word Problems

605-655 (Medium) | Word Problems hide tags

Bunuel

16 Jan 2015, 07:40

62

7

11,420

by: Bunuel

19 Aug 2026, 10:11