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

78,839

by: thisisakr

16 Apr 2026, 11:46

ER

100 Hardest and easiest questions for DS as of April 2026

1, 2

Bunuel

01 Jan 2026, 05:45

856

24

188,596

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

488,042

by: bb

29 Aug 2025, 13:27

ER

If (ax + by)^2 = (bx + ay)^2, what is the value of a b ?

805+ (Hard) | Algebra

805+ (Hard) | Algebra hide tags

Bunuel

20 Nov 2022, 13:00

14

6

3,083

by: Bunuel

01 Jun 2024, 12:34

ER

In the infinite sequence S, where S1 = 25, S2 = 125, S3 =

705-805 (Hard) | Multiples and Factors, Sequences

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

guygmat

19 Jun 2011, 08:03

14

11

5,468

by: bumpbot

31 May 2024, 16:33

ER

If the greatest common factor of positive integers A and B is 20, what

605-655 (Medium) | Multiples and Factors

605-655 (Medium) | Multiples and Factors hide tags

Bunuel

28 Apr 2016, 01:07

14

6

7,282

by: bumpbot

12 May 2024, 03:07

ER

Is the integer z divisible by 15?

555-605 (Medium) | Multiples and Factors

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

Bunuel

16 Dec 2020, 01:15

14

11

3,312

by: bumpbot

09 May 2024, 17:23

ER

How many more first-time jobless claims were filed in week P than in

505-555 (Easy) | Word Problems

505-555 (Easy) | Word Problems hide tags

Bunuel

01 Jul 2018, 21:45

14

2

6,340

by: bumpbot

02 May 2024, 04:45

ER

What is the Standard Deviation of the set containing values A, B, C

655-705 (Hard) | Statistics and Sets Problems

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

Bunuel

04 Jan 2021, 09:11

14

3

2,827

by: bumpbot

21 Apr 2024, 04:15

ER

What is the mean of the exams taken by a group of students?

505-555 (Easy) | Statistics and Sets Problems

505-555 (Easy) | Statistics and Sets Problems hide tags

Bunuel

05 Feb 2015, 09:13

14

6

6,931

by: bumpbot

19 Apr 2024, 01:01

ER

Is z even? (1) 5z is even. (2) 15z is even.

655-705 (Hard) | Number Properties

655-705 (Hard) | Number Properties hide tags

Bunuel

17 Nov 2020, 01:15

14

9

2,574

by: bumpbot

17 Apr 2024, 00:49

ER

The lengths of two sides of a certain triangle are 3 and 9. What is th

555-605 (Medium) | Geometry

555-605 (Medium) | Geometry hide tags

MathRevolution

19 Feb 2018, 01:25

14

5

5,439

by: bumpbot

31 Mar 2024, 09:04

ER

At a certain hotel, every room has air conditioning or cable TV

655-705 (Hard) | Overlapping Sets

655-705 (Hard) | Overlapping Sets hide tags

BrentGMATPrepNow

20 Sep 2016, 13:54

14

6

4,632

by: bumpbot

19 Feb 2024, 11:28

ER

Is 13N a positive number?

505-555 (Easy) | Inequalities, Number Properties

505-555 (Easy) | Inequalities, Number Properties hide tags

Bunuel

18 Mar 2016, 00:21

14

5

7,205

by: bumpbot

16 Feb 2024, 13:10

ER

If x+y/n < x+z/n, is n positive?

705-805 (Hard) | Inequalities

705-805 (Hard) | Inequalities hide tags

BrentGMATPrepNow

04 Aug 2019, 10:56

14

3

4,500

by: bumpbot

11 Feb 2024, 01:06

ER

Arc XYZ lies on a circle centered at O. Is a < 55?

605-655 (Medium) | Geometry

605-655 (Medium) | Geometry hide tags

Bunuel

27 Jan 2015, 07:40

14

9

7,598

by: bumpbot

27 Jan 2024, 23:57

ER

If x/2 = 3/y, is x less than y? (1) y >= 3 (2) y <= 4

505-555 (Easy) | Inequalities

505-555 (Easy) | Inequalities hide tags

Bunuel

13 Jul 2018, 04:35

14

8

10,645

by: bumpbot

24 Jan 2024, 14:37

ER

Is |w-6| > 5 ?

555-605 (Medium) | Absolute Values, Inequalities

555-605 (Medium) | Absolute Values, Inequalities hide tags

1991sehwag

18 Jan 2015, 02:55

14

7

4,308

by: bumpbot

17 Jan 2024, 02:56

ER

In the Sequence P, is P11 > P10?

705-805 (Hard) | Exponents +2 tags

705-805 (Hard) | Exponents, Inequalities, Sequences hide tags

Bunuel

06 Jan 2021, 06:41

14

5

3,427

by: bumpbot

16 Jan 2024, 21:36

ER

Is x^2 greater than x-y?

705-805 (Hard) | Inequalities

705-805 (Hard) | Inequalities hide tags

steilbergauf

13 May 2014, 06:31

14

4

4,549

by: bumpbot

16 Jan 2024, 07:56

ER

Is the triangle above equilateral?

Sub 505 (Easy) | Geometry

Sub 505 (Easy) | Geometry hide tags

broall

04 Feb 2018, 03:20

14

5

12,075

by: bumpbot

12 Jan 2024, 08:34

ER

If AB || DE and AB = 10, what is the length of DE?

655-705 (Hard) | Geometry

655-705 (Hard) | Geometry hide tags

BrentGMATPrepNow

25 Oct 2018, 08:24

14

6

5,533

by: NotFine233

11 Jan 2024, 08:02

ER

Is ABC a right triangle?

555-605 (Medium) | Geometry

555-605 (Medium) | Geometry hide tags

smartyman

24 Jun 2014, 07:59

14

4

5,998

by: bumpbot

10 Jan 2024, 08:30

ER

If a and b are integers, what is the value of ab?

555-605 (Medium) | Algebra, Exponents

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

kiran120680

30 May 2019, 04:04

14

5

6,437

by: bumpbot

05 Jan 2024, 01:37

ER

What is the retail price of a certain calculator? (1) The retail pri

Sub 505 (Easy) | Arithmetic

Sub 505 (Easy) | Arithmetic hide tags

anairamitch1804

26 Jan 2017, 12:16

14

3

14,619

by: bumpbot

05 Jan 2024, 01:16

ER

If x and y are prime numbers, is y(x-3) odd?

605-655 (Medium) | Number Properties

605-655 (Medium) | Number Properties hide tags

1, 2

bjshukla

08 May 2015, 08:29

14

25

14,395

by: bumpbot

01 Jan 2024, 06:21

ER

The graph above shows two lines, one on the left of the y-axis and one

655-705 (Hard) | Coordinate Plane

655-705 (Hard) | Coordinate Plane hide tags

Bunuel

13 Nov 2019, 02:12

14

2

3,256

by: bumpbot

26 Dec 2023, 04:20

ER

Each of the letters in the table above represents one of the numbers 3

805+ (Hard) | Graphs and Illustrations

805+ (Hard) | Graphs and Illustrations hide tags

Bunuel

30 Aug 2019, 06:22

14

2

3,704

by: bumpbot

18 Dec 2023, 05:50

ER

Textbook press offers discounts on orders placed sufficient

655-705 (Hard) | Statistics and Sets Problems

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

goodyear2013

21 Jan 2014, 09:44

14

3

5,358

by: bumpbot

15 Dec 2023, 04:30

ER

If a, b, and c are real numbers, is a/b > b/c ?

655-705 (Hard) | Inequalities

655-705 (Hard) | Inequalities hide tags

hemanthp

21 May 2017, 05:56

14

8

4,605

by: bumpbot

28 Nov 2023, 11:17

ER

What is the value of p? (1) 4|q^2 - 1| = p - 5 (2) |7 - p| = 6

655-705 (Hard) | Absolute Values

655-705 (Hard) | Absolute Values hide tags

Bunuel

15 Jun 2020, 02:02

14

11

4,008

by: bumpbot

31 Oct 2023, 07:38

ER

What is the remainder when a positive integer P is divided by 20?

555-605 (Medium) | Multiples and Factors, Number Properties

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

Bunuel

12 Feb 2020, 01:48

14

12

6,894

by: bumpbot

26 Oct 2023, 11:39

ER

Set T consists of a certain number of even integers divisible by 3. Is

555-605 (Medium) | Statistics and Sets Problems

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

jeetparicha85

30 Mar 2022, 04:01

14

5

8,245

by: bumpbot

18 Oct 2023, 09:20

ER

Let ∆ and O be two distinct digits in the decimal ∆.O∆, what is ∆?

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

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

Bunuel

20 Oct 2019, 21:48

14

11

2,767

by: bumpbot

09 Oct 2023, 23:37

ER

Let a, b, c, d, and e represent positive integers. Is |ab + c| = cd -

705-805 (Hard) | Absolute Values, Inequalities

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

Bunuel

28 Nov 2019, 00:05

14

11

2,663

by: bumpbot

07 Oct 2023, 22:23

ER

If a and b are two distinct positive integers, what is the remainder

705-805 (Hard) | Multiples and Factors +2 tags

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

Bunuel

05 Jan 2022, 04:00

14

4

3,395

by: bumpbot

07 Oct 2023, 12:04

ER

If the average (arithmetic mean) monthly sales of a department store

705-805 (Hard) | Statistics and Sets Problems

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

Bunuel

11 Nov 2019, 03:43

14

4

4,378

by: bumpbot

03 Oct 2023, 23:19

ER

Is x > 0 ? (1) |x - 5| = 7x - 11 (2) |x + 5| = |x - 9|

605-655 (Medium) | Absolute Values, Inequalities

605-655 (Medium) | Absolute Values, Inequalities hide tags

Bunuel

06 Jan 2021, 01:15

14

3

4,308

by: bumpbot

03 Oct 2023, 07:31

ER

If a and b are positive integers, is a^2 + b^2 divisible by 5?

555-605 (Medium) | Multiples and Factors

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

Bunuel

30 Sep 2017, 01:43

14

5

6,886

by: Bunuel

01 Oct 2023, 10:56

ER

One of the sides of a triangle tht inscribe in a circle is 6

555-605 (Medium) | Geometry

555-605 (Medium) | Geometry hide tags

stunn3r

25 Jun 2013, 02:08

14

8

8,944

by: bumpbot

24 Sep 2023, 21:54

ER

If m and n are positive integers, what is the remainder when m is divi

605-655 (Medium) | Remainders

605-655 (Medium) | Remainders hide tags

Princ

01 Aug 2018, 05:08

14

4

3,732

by: bumpbot

09 Sep 2023, 21:59

If a and b are positive integers, what is the remainder of a^3-b^3 ?

655-705 (Hard) | Multiples and Factors +2 tags

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

freedom128

30 Jul 2019, 04:26

14

4

2,198

by: bumpbot

09 Sep 2023, 06:35

ER

In the figure above, if ABC and ADC are isosceles triangles, what is

805+ (Hard) | Geometry

805+ (Hard) | Geometry hide tags

Princ

05 Nov 2018, 10:33

14

3

3,828

by: bumpbot

05 Sep 2023, 05:06

ER

If x, n, and y are all positive integers, is x^n divisible

655-705 (Hard) | Multiples and Factors

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

MichelleSavina

26 Jan 2011, 05:21

14

5

5,472

by: bumpbot

02 Sep 2023, 08:59

ER

If x and are none negative integer, what is the value of x

655-705 (Hard) | Algebra, Exponents

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

loveparis

18 Jun 2023, 06:08

14

5

5,331

by: Biswadeep20

22 Aug 2023, 12:15

ER

If n > 0, which is greater, 20 percent of n or 10 percent of

555-605 (Medium) | Percent and Interest Problems

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

yezz

27 Apr 2013, 04:16

14

6

8,640

by: bumpbot

19 Aug 2023, 02:48

ER

If n is a positive integer, is n divisible by at least six positive in

505-555 (Easy) | Multiples and Factors, Number Properties

505-555 (Easy) | Multiples and Factors, Number Properties hide tags

Bunuel

16 Apr 2020, 03:43

14

4

7,621

by: bumpbot

16 Aug 2023, 05:31

ER

a, b, c, and d lie on the number line such that a < b.

555-605 (Medium) | Coordinate Plane

555-605 (Medium) | Coordinate Plane hide tags

pushpitkc

23 Aug 2018, 00:36

14

7

4,795

by: bumpbot

13 Aug 2023, 04:37

ER

Is the quadrilateral ABCD a rectangle? (1) Mid points of AB, BC, CD

805+ (Hard) | Geometry

805+ (Hard) | Geometry hide tags

amanvermagmat

25 Jun 2018, 10:59

14

7

3,037

by: bumpbot

12 Aug 2023, 11:29

ER

If r and s are nonzero integers, is r/s an integer ?

805+ (Hard) | Algebra, Number Properties

805+ (Hard) | Algebra, Number Properties hide tags

Bunuel

10 Oct 2017, 01:16

14

3

3,750

by: bumpbot

07 Aug 2023, 03:14

ER

If "x" denotes the greatest integer less than or equal to x

655-705 (Hard) | Functions and Custom Characters, Sequences

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

jfdelgado

21 May 2018, 10:00

14

10

5,291

by: bumpbot

06 Aug 2023, 14:50

ER

Is the length of a side of equilateral triangle E less than

555-605 (Medium) | Geometry

555-605 (Medium) | Geometry hide tags

mun23

07 Dec 2012, 13:27

14

15

21,588

by: bumpbot

05 Aug 2023, 10:13

ER

Is (x + y)/2 an integer?

655-705 (Hard) | Number Properties

655-705 (Hard) | Number Properties hide tags

Bunuel

25 Jun 2017, 03:34

14

6

4,330

by: Bunuel

05 Aug 2023, 01:01