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

179

15

79,579

by: thisisakr

16 Apr 2026, 11:46

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100 Hardest and easiest questions for DS as of April 2026

1, 2

Bunuel

01 Jan 2026, 05:45

858

24

188,960

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

488,641

by: bb

29 Aug 2025, 13:27

ER

Lori's Laminate has set an annual goal of cutting head count at its Te

705-805 (Hard) | Word Problems

705-805 (Hard) | Word Problems hide tags

Bunuel

18 Jun 2022, 07:30

6

5

1,618

by: Bunuel

04 Sep 2025, 08:31

ER

Is the average (arithmetic mean) height of Porthos, Athos, and Aramis

555-605 (Medium) | Statistics and Sets Problems

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

Bunuel

24 Mar 2026, 08:22

15

7

6,529

by: bumpbot

04 Sep 2025, 08:58

ER

If |x| = |y|, is x/y = -1 (1) x < 0 (2) y > 0

Sub 505 (Easy) | Absolute Values

Sub 505 (Easy) | Absolute Values hide tags

DaniGmat77

07 Aug 2020, 10:53

13

3

5,941

by: bumpbot

04 Sep 2025, 15:20

ER

If the probability that there is exactly 1 defective pen in a box is 1

655-705 (Hard) | Probability

655-705 (Hard) | Probability hide tags

Bunuel

13 Nov 2019, 01:52

18

2

5,367

by: bumpbot

05 Sep 2025, 09:00

ER

How long does it take for Ben to travel from his home to office on Fri

655-705 (Hard) | Distance and Speed Problems

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

hr1212

11 Feb 2025, 07:01

16

4

2,016

by: stne

06 Sep 2025, 10:43

ER

Jake invested x dollars for a simple annual interest rate of y percent

655-705 (Hard) | Percent and Interest Problems

655-705 (Hard) | Percent and Interest Problems hide tags

Bunuel

13 May 2021, 22:00

11

3

5,237

by: bumpbot

06 Sep 2025, 14:03

ER

The ratio of cats to dogs at a pet store is 11:15. The ratio of dogs

655-705 (Hard) | Fractions and Ratios

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

Bunuel

26 Nov 2019, 00:55

5

5,769

by: Bunuel

07 Sep 2025, 09:47

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If x and y are consecutive even numbers, what is the value of x + y?

705-805 (Hard) | Number Properties

705-805 (Hard) | Number Properties hide tags

gmatophobia

10 Apr 2022, 13:11

7

2

1,787

by: bumpbot

07 Sep 2025, 09:48

ER

In how many places does the graph of the equation y = ax^2 + bx + c in

555-605 (Medium) | Coordinate Plane

555-605 (Medium) | Coordinate Plane hide tags

Bunuel

26 Mar 2020, 01:27

25

10

5,901

by: bumpbot

07 Sep 2025, 11:22

ER

If m and n are positive integers where m>n, and if z is and odd prime

705-805 (Hard) | Multiples and Factors, Number Properties

705-805 (Hard) | Multiples and Factors, Number Properties hide tags

Bunuel

08 Jun 2023, 01:30

13

4

2,043

by: bumpbot

07 Sep 2025, 13:38

ER

The host of a television debate show has to select a 4-member

655-705 (Hard) | Combinations

655-705 (Hard) | Combinations hide tags

kiran120680

17 Apr 2019, 05:10

39

6

7,707

by: DylanD

08 Sep 2025, 11:25

ER

A store purchased a computer for $800 and then sold it. Was the store

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

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

gmatophobia

18 Feb 2024, 22:44

47

4

10,780

by: bumpbot

08 Sep 2025, 13:40

ER

Can a batch of identical cookies be split evenly between Laurel and Je

555-605 (Medium) | Remainders

555-605 (Medium) | Remainders hide tags

Bunuel

24 Oct 2014, 09:20

50

11

16,308

by: bumpbot

09 Sep 2025, 07:35

ER

If A represents the tens digit and B represents the units digit in the

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

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

Bunuel

23 Oct 2023, 01:30

2

4

1,341

by: Bunuel

09 Sep 2025, 08:42

ER

If x is a positive integer, is x divisible by 4?

805+ (Hard) | Multiples and Factors

805+ (Hard) | Multiples and Factors hide tags

Bunuel

20 Oct 2021, 03:30

6

3

3,783

by: bumpbot

09 Sep 2025, 09:12

ER

All the apartments in a certain building are either three-bedroom apar

655-705 (Hard) | Statistics and Sets Problems

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

gmatophobia

24 Feb 2024, 14:47

97

7

15,646

by: Bunuel

10 Sep 2025, 10:42

ER

Let x and y be 2 positive integers such that x/y=12.12, what is the va

705-805 (Hard) | Number Properties

705-805 (Hard) | Number Properties hide tags

AkhilAggarwal

26 May 2021, 17:31

18

5

3,224

by: bumpbot

10 Sep 2025, 10:52

ER

Is 7^7/7^x an integer?

655-705 (Hard) | Algebra +2 tags

655-705 (Hard) | Algebra, Exponents, Number Properties hide tags

aramjung

19 Mar 2010, 19:35

38

3

15,061

by: bumpbot

11 Sep 2025, 00:16

ER

If x^(1/3) is a positive integer, does x^(1/3) have more than two dist

655-705 (Hard) | Exponents, Multiples and Factors

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

alphabeta1234

08 Apr 2012, 19:36

22

6

6,137

by: bumpbot

11 Sep 2025, 03:11

ER

Is x² + y² > -2xy? (1) xy > 0 (2) x - y = 4

655-705 (Hard) | Algebra, Inequalities

655-705 (Hard) | Algebra, Inequalities hide tags

BrentGMATPrepNow

07 Mar 2023, 09:14

3

4

3,123

by: bumpbot

11 Sep 2025, 07:04

ER

In a certain company, the average (arithmetic mean) salary of finance

705-805 (Hard) | Statistics and Sets Problems

705-805 (Hard) | Statistics and Sets Problems hide tags

GMATBusters

07 Oct 2018, 05:26

13

14

3,878

by: bumpbot

12 Sep 2025, 04:32

ER

A shop offers candy bars for sale either individually or in packs of

505-555 (Easy) | Word Problems

505-555 (Easy) | Word Problems hide tags

Bunuel

11 Aug 2025, 05:16

12

4

7,109

by: bumpbot

12 Sep 2025, 09:19

ER

When a positive integer 'x' is divided by a divisor 'd', the remainder

805+ (Hard) | Multiples and Factors, Remainders

805+ (Hard) | Multiples and Factors, Remainders hide tags

Bunuel

09 Mar 2016, 13:36

129

9

14,423

by: bumpbot

12 Sep 2025, 14:56

ER

From a group consisting of ballet dancers from Italy, Germany, and

655-705 (Hard) | Combinations

655-705 (Hard) | Combinations hide tags

eshan429

04 Sep 2014, 20:29

31

8

8,412

by: bumpbot

13 Sep 2025, 07:15

ER

What is the value of x? (1) x^4 + x^2 + 1 =1/(x^4 + x^2 + 1) (2) x^3

605-655 (Medium) | Algebra

605-655 (Medium) | Algebra hide tags

gmatt1476

21 Sep 2019, 16:35

122

12

19,172

by: bumpbot

13 Sep 2025, 11:08

ER

GMAT Club Around The World!!! Jane and Chris work at a factory produci

655-705 (Hard) | Work and Rate Problems

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

Bunuel

31 Dec 2020, 21:00

6

8

4,242

by: bumpbot

13 Sep 2025, 16:40

ER

If x and y are prime numbers, and n is a positive integer, what is the

805+ (Hard) | Multiples and Factors, Number Properties

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

Bunuel

11 Nov 2023, 06:37

10

4

2,211

by: Bunuel

14 Sep 2025, 11:13

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If |a + 1| =|b - 1|, what is the value of a - b? (1) ab > 0 (2) a/b-1

805+ (Hard) | Absolute Values, Inequalities

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

Bunuel

12 Jun 2023, 06:15

13

4

2,014

by: stne

14 Sep 2025, 12:42

ER

What is the remainder when the positive three-digit number xyz is divi

655-705 (Hard) | Multiples and Factors, Remainders

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

Bunuel

31 Jan 2022, 02:30

17

4

3,342

by: bumpbot

14 Sep 2025, 19:25

ER

If p and q are prime numbers, is pq+1 an odd number?

555-605 (Medium) | Number Properties

555-605 (Medium) | Number Properties hide tags

Bunuel

30 Jun 2023, 04:00

2

3

1,198

by: Bunuel

14 Sep 2025, 23:58

ER

A computer dealership has a number of computers to be sold by its sale

555-605 (Medium) | Word Problems

555-605 (Medium) | Word Problems hide tags

Bunuel

12 Sep 2025, 00:37

4

7

586

by: Bunuel

15 Sep 2025, 00:10

ER

Iris delivered newspapers for 7 consecutive weeks. In the sequence

505-555 (Easy) | Word Problems

505-555 (Easy) | Word Problems hide tags

Bunuel

11 Aug 2023, 05:00

46

3

16,022

by: bumpbot

15 Sep 2025, 08:08

ER

How many different prime factors does x have?

655-705 (Hard) | Number Properties

655-705 (Hard) | Number Properties hide tags

Harley1980

13 Apr 2015, 00:57

12

5

3,970

by: bumpbot

15 Sep 2025, 13:11

ER

At a certain university, all employees can be categorized as either pr

705-805 (Hard) | Statistics and Sets Problems

705-805 (Hard) | Statistics and Sets Problems hide tags

Bunuel

18 May 2017, 00:18

33

8

7,598

by: bumpbot

15 Sep 2025, 13:58

ER

What is the units digit of the non-negative integer y?

705-805 (Hard) | Fractions and Ratios, Number Properties

705-805 (Hard) | Fractions and Ratios, Number Properties hide tags

Bunuel

25 Nov 2014, 08:30

14

11

5,307

by: bumpbot

15 Sep 2025, 16:13

ER

If xy 0, is x^y > 0 ?

655-705 (Hard) | Exponents +2 tags

655-705 (Hard) | Exponents, Inequalities, Roots hide tags

Bunuel

20 Jul 2014, 11:23

63

11

11,948

by: bumpbot

16 Sep 2025, 06:24

ER

If n is a positive integer, what is the units digit of n^28? (I) n is

655-705 (Hard) | Number Properties

655-705 (Hard) | Number Properties hide tags

Russ19

28 Apr 2020, 09:08

11

3

1,657

by: bumpbot

16 Sep 2025, 08:46

ER

A certain high school with a total enrollment of 900 student

555-605 (Medium) | Word Problems

555-605 (Medium) | Word Problems hide tags

Bunuel

21 Oct 2022, 07:41

85

5

46,265

by: bumpbot

16 Sep 2025, 23:36

ER

What is the value of the two-digit number TU

655-705 (Hard) | Number Properties

655-705 (Hard) | Number Properties hide tags

fireinbelly

30 Apr 2013, 05:45

20

6

8,623

by: bumpbot

17 Sep 2025, 12:58

ER

What is the value of positive integer p? (1) 300 multiplied by p is

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

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

Bunuel

28 Jun 2023, 01:30

3

1,387

by: bumpbot

17 Sep 2025, 13:04

ER

A family's savings for a month is calculated by subtracting its total

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

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

amanvermagmat

21 Jul 2018, 11:03

6

2

2,910

by: bumpbot

17 Sep 2025, 20:36

ER

The price of a certain property increased by 10% in the first year

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

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

Bunuel

02 Aug 2023, 01:30

5

4

6,002

by: KarishmaB

17 Sep 2025, 21:22

ER

11 New OG Logic-Based DS for GMAT Focus; Analysis of OG22 vs. 2024

655-705 (Hard) | Word Problems

655-705 (Hard) | Word Problems hide tags

GMATCoachBen

10 Mar 2024, 22:35

20

3

6,499

by: bumpbot

17 Sep 2025, 23:51

ER

Is |x| > x ? (1) x > |y| (2) x is a non-negative integer

655-705 (Hard) | Absolute Values, Inequalities

655-705 (Hard) | Absolute Values, Inequalities hide tags

chetan2u

21 Feb 2017, 07:54

8

7

3,478

by: bumpbot

18 Sep 2025, 04:36

ER

If a salesman received a commission of 3% of the sales

555-605 (Medium) | Word Problems

555-605 (Medium) | Word Problems hide tags

ashwink

01 Mar 2017, 05:51

9

2

17,751

by: bumpbot

18 Sep 2025, 17:19

ER

Consider 20 identical pipes that supply water to a tank. What is the m

705-805 (Hard) | Work and Rate Problems

705-805 (Hard) | Work and Rate Problems hide tags

Bunuel

12 Jan 2022, 04:00

8

3

3,223

by: bumpbot

19 Sep 2025, 01:41

ER

What is the highest power of 2 in n!?

705-805 (Hard) | Number Properties

705-805 (Hard) | Number Properties hide tags

GMATBusters

23 May 2020, 19:00

35

19

11,629

by: bumpbot

19 Sep 2025, 02:10

ER

If 1@1 = 1, is −2@−2 = 1 ? (1) 1@-1 = 1 (2) 0@0 = 0

655-705 (Hard) | Functions and Custom Characters

655-705 (Hard) | Functions and Custom Characters hide tags

Bunuel

06 Apr 2020, 04:04

23

7

4,686

by: bumpbot

19 Sep 2025, 08:44

ER

Each of 30 parents chose one of five days from Monday throug

705-805 (Hard) | Arithmetic

705-805 (Hard) | Arithmetic hide tags

banksy

14 Mar 2011, 16:31

25

6

7,083

by: HarshG7

20 Sep 2025, 02:48

ER

Is the non-negative number r prime?

705-805 (Hard) | Number Properties

705-805 (Hard) | Number Properties hide tags

blowice27

17 Sep 2019, 01:36

5

6

3,640

by: bumpbot

20 Sep 2025, 07:01