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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100 Hardest and easiest questions for DS as of May 2026

1, 2

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01 Jan 2026, 05:45

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16 Sep 2025, 06:05

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DS Question Directory by Topic and Difficulty

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29 Aug 2025, 13:27

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491,037

by: bb

29 Aug 2025, 13:27

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Schwartz Bank has more than 100 interns. Of the m male inter

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kevincan

21 Mar 2026, 01:35

2

1

339

by: kittiponrw

20 Mar 2026, 07:40

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A community center recorded the number of evening workshops it held in

555-605 (Medium) | Statistics and Sets Problems

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Bunuel

07 May 2026, 19:00

2

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339

by: Bunuel

10 May 2026, 03:00

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A regional express train normally travels from Northgate Station to

605-655 (Medium) | Distance and Speed Problems

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Bunuel

14 May 2026, 19:00

3

338

by: BongBideshini

15 May 2026, 10:46

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The population of Greenvale increases by 10 percent each year.

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Bunuel

18 Jan 2026, 07:45

1

337

by: shivani1351

01 Feb 2026, 22:38

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Bill bought several binders. If each binder was either a $2.20 binder

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Bunuel

18 Jan 2026, 05:45

1

335

by: shivani1351

01 Feb 2026, 22:50

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At a museum, all visitors in a certain tour group were either students

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Bunuel

27 Apr 2026, 19:00

5

4

334

by: Bunuel

01 May 2026, 01:30

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What is the volume of milk present in a mixture of milk and water?

555-605 (Medium) | Mixture Problems

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Bunuel

22 Jan 2026, 09:15

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332

by: shivani1351

22 Jan 2026, 23:51

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At a community center, a total of 31 people enrolled in at least one

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Bunuel

27 Apr 2026, 19:00

7

5

332

by: Bunuel

01 May 2026, 02:15

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The village of Devis is hosting a summit attended by 100 dip

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kevincan

24 Mar 2026, 08:16

1

329

by: Edskore

24 Mar 2026, 09:39

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An off-season discount of x percent is being offered at a store for

655-705 (Hard) | Percent and Interest Problems

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Bunuel

14 Jan 2026, 09:15

3

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328

by: ADisHere

14 Jan 2026, 13:09

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Jerome bought 12 T-shirts for his shop. Premium shirts cost

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kevincan

11 Mar 2026, 15:18

2

1

328

by: Dereno

12 Mar 2026, 01:47

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Before the start of the fall service cycle, the city transit authority

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Bunuel

14 Apr 2026, 19:00

5

4

328

by: Bunuel

21 Apr 2026, 04:00

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At a one-day music workshop, some registered participants attended the

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Bunuel

12 May 2026, 19:00

2

3

328

by: Bunuel

01 Jun 2026, 11:45

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A neighborhood library purchased 45 paperback copies of a novel at an

655-705 (Hard) | Statistics and Sets Problems, Word Problems

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Bunuel

29 Apr 2026, 19:00

4

327

by: Bunuel

02 May 2026, 01:30

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A lab technician mixed two salt solutions, Solution A and Solution B.

555-605 (Medium) | Mixture Problems

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Bunuel

11 May 2026, 19:00

3

4

327

by: Bunuel

01 Jun 2026, 03:30

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To increase revenue, a soft-drink company changed the price of and

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Bunuel

21 Jan 2026, 09:15

1

326

by: shivani1351

23 Jan 2026, 22:50

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A community theater sold tickets for the same show in January and in

655-705 (Hard) | Percent and Interest Problems

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Bunuel

22 Apr 2026, 19:00

4

3

325

by: Bunuel

30 Apr 2026, 02:45

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A beverage company prepared two batches of sports drink, Batch A and B

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Bunuel

17 May 2026, 19:00

2

4

322

by: SS990

21 May 2026, 05:34

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A juice bar mixed apple juice and berry concentrate to make 6 liters

655-705 (Hard) | Mixture Problems

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Bunuel

27 May 2026, 19:00

4

3

322

by: Bunuel

05 Jun 2026, 01:15

ER

A design studio bought a commercial 3D printer. If at the end of each

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Bunuel

30 May 2026, 11:15

10

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321

by: Bunuel

07 Jun 2026, 02:45

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If 60 people attend a party, how many of these people drink coffee?

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Bunuel

22 Jan 2026, 05:45

1

320

by: shivani1351

23 Jan 2026, 00:29

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In a class, there are 170 students, each of whom plays at least one of

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Bunuel

20 Apr 2026, 19:00

2

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320

by: Bunuel

28 Apr 2026, 02:00

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At a food fair, Nora bought 8 kilograms of nuts from each of two

805+ (Hard) | Fractions and Ratios, Word Problems

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Bunuel

29 Apr 2026, 19:00

4

8

319

by: Bunuel

02 May 2026, 02:45

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During a wedding season, two event venues, Cedar Hall and Willow Hall

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Bunuel

22 Apr 2026, 19:00

3

4

318

by: Bunuel

30 Apr 2026, 01:00

ER

During lunch service, a snack kiosk sold bread rolls, wraps, bowls of

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

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Bunuel

26 Apr 2026, 19:00

1

3

318

by: Bunuel

30 Apr 2026, 06:45

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At a shipping center, every package in a certain batch is either

555-605 (Medium) | Probability

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Bunuel

19 Apr 2026, 19:00

5

3

316

by: Bunuel

26 Apr 2026, 01:00

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A high school volleyball team completed its regular season last spring

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

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Bunuel

30 Apr 2026, 19:00

5

316

by: Bunuel

02 May 2026, 03:30

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At a stationery shop, Nora spent $84 on sketchbooks and colored marker

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Bunuel

18 May 2026, 19:00

3

316

by: Edskore

19 May 2026, 14:12

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At a science quiz, Team Atlas consisted of Elena, Hugo, and Liam, and

655-705 (Hard) | Statistics and Sets Problems, Word Problems

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Bunuel

14 May 2026, 19:00

2

314

by: SS990

14 May 2026, 23:05

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If it rained for twice as long on Monday as on Tuesday, and if it rain

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ExpertsGlobal5

07 Jan 2026, 22:00

1

2

312

by: ExpertsGlobal5

11 Jan 2026, 08:00

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A small theater sold only adult tickets and student tickets for one

705-805 (Hard) | Statistics and Sets Problems, Word Problems

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Bunuel

28 May 2026, 19:00

9

3

312

by: Bunuel

06 Jun 2026, 01:00

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If a group of five Democrats take 3 hours to write a proposal, how

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Bunuel

20 Jan 2026, 15:45

1

309

by: shivani1351

20 Jan 2026, 22:53

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A school used several buses for a field trip. If each bus carried

655-705 (Hard) | Statistics and Sets Problems

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Bunuel

28 May 2026, 19:00

6

5

306

by: Bunuel

06 Jun 2026, 02:45

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Company A produced w, x, y and z cars per year respectively over the

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Bunuel

06 Jun 2026, 04:30

2

306

by: Stella5200

07 Jun 2026, 01:46

ER

A festival organizer is putting together the final set of food trucks

555-605 (Medium) | Combinations

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Bunuel

20 Apr 2026, 19:00

6

4

304

by: Bunuel

28 Apr 2026, 01:45

ER

At a delivery depot, some parcels currently loaded onto Van Cedar are

655-705 (Hard) | Percent and Interest Problems, Word Problems

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Bunuel

03 May 2026, 19:00

5

304

by: Bunuel

07 May 2026, 02:30

ER

Once all applicants were sorted into groups of 6, for group discussion

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ExpertsGlobal5

18 Feb 2026, 20:00

1

3

301

by: ExpertsGlobal5

21 Feb 2026, 08:00

ER

A vending machine dispenses one drink at random from 48 drinks stocked

805+ (Hard) | Overlapping Sets, Probability

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Bunuel

03 May 2026, 19:00

3

4

301

by: Bunuel

07 May 2026, 01:30

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At a certain car dealership, what percent of the cars both weigh more

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Bunuel

04 May 2026, 19:00

1

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300

by: Bunuel

08 May 2026, 02:00

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At a warehouse, the daily output of Machine Orion is two-thirds of the

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Bunuel

15 Apr 2026, 19:00

4

3

299

by: Bunuel

22 Apr 2026, 02:45

ER

A publishing company allocated its entire annual operating budget

705-805 (Hard) | Percent and Interest Problems

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Bunuel

28 Apr 2026, 19:00

5

4

298

by: Bunuel

01 May 2026, 03:00

ER

At a small architecture firm, the average (arithmetic mean) age of the

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Bunuel

23 Apr 2026, 19:00

2

4

296

by: Bunuel

30 Apr 2026, 04:15

ER

A warehouse manager recorded the weights of all the crates in one

555-605 (Medium) | Statistics and Sets Problems

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Bunuel

10 May 2026, 19:00

3

5

295

by: Adit_

11 May 2026, 07:32

ER

A home-goods warehouse inspected a shipment of ceramic mugs for

555-605 (Medium) | Overlapping Sets, Probability

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Bunuel

17 May 2026, 19:00

4

2

294

by: BongBideshini

18 May 2026, 23:35

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During two 7-day promotional weeks, Week 1 and Week 2, a bike-share

805+ (Hard) | Percent and Interest Problems, Word Problems

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Bunuel

14 Apr 2026, 19:00

5

4

293

by: Bunuel

21 Apr 2026, 03:30

ER

Is the distance traveled in t seconds at a feet per second greater

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Bunuel

20 Jan 2026, 13:45

1

291

by: trocha

20 Jan 2026, 16:18

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If Nadia, Dan and Rachel have a total of $120, how much money does

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Bunuel

17 Jan 2026, 09:15

3

2

290

by: AravNaidu

18 Jan 2026, 02:11

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When the point totals for 20 participants were recorded, thr

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kevincan

15 Mar 2026, 16:03

2

1

290

by: Edskore

16 Mar 2026, 01:27

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At the beginning of 2024, Elena divided $1,200 between two savings

655-705 (Hard) | Percent and Interest Problems

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Bunuel

25 May 2026, 19:00

1

3

290

by: Bunuel

03 Jun 2026, 02:30

ER

In a survey, voters were asked whether they approve or disapprove of

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Bunuel

06 Jun 2026, 02:30

1

4

289

by: akshatpatodia

06 Jun 2026, 21:54