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

79,580

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

Are lines p (with slope m) and q (with slope n) perpendicular to each

655-705 (Hard) | Coordinate Plane

655-705 (Hard) | Coordinate Plane hide tags

Bunuel

10 Mar 2016, 05:11

6

7

3,785

by: bumpbot

23 Jul 2021, 09:08

ER

In a certain school district, math teachers are considered qualified

605-655 (Medium) | Overlapping Sets

605-655 (Medium) | Overlapping Sets hide tags

Bunuel

27 Oct 2021, 08:00

13

4

3,785

by: bumpbot

20 Jul 2025, 12:38

ER

The average (arithmetic mean) monthly balance in Company X's petty

705-805 (Hard) | Word Problems

705-805 (Hard) | Word Problems hide tags

Bunuel

24 Jun 2017, 12:25

8

2

3,785

by: bumpbot

13 Oct 2025, 11:47

ER

If a, b, c, and d are positive numbers, and a/b=c/d, what is the value

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

Bunuel

17 Jul 2016, 11:32

6

5

3,787

by: bumpbot

16 Jan 2026, 23:47

ER

If m ≠ 0 and n ≠ 0, is mn > 0?

555-605 (Medium) | Absolute Values, Inequalities

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

Bunuel

29 Apr 2016, 03:56

8

6

3,789

by: ManishKM1

13 Aug 2017, 20:28

ER

There are c chocolate chip cookies and r oatmeal raisin cookies in a T

555-605 (Medium) | Probability

555-605 (Medium) | Probability hide tags

Bunuel

06 Apr 2016, 07:01

4

3,789

by: bumpbot

14 Jan 2023, 17:31

ER

In a certain sequence, the term

505-555 (Easy) | Sequences

505-555 (Easy) | Sequences hide tags

BrentGMATPrepNow

26 Oct 2016, 12:52

10

5

3,789

by: bumpbot

08 Mar 2025, 12:03

ER -1

GMAT Club Olympics 2025 (Day 4): A rental firm has only two distinct

805+ (Hard) | Probability

805+ (Hard) | Probability hide tags

1, 2...5, 6

Bunuel

03 Jul 2025, 08:00

58

102

3,789

by: HarshavardhanR

04 Jul 2025, 08:58

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If x is a non-zero integer (40 + 24)/x is an integer?

605-655 (Medium) | Multiples and Factors

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

Bunuel

29 Oct 2015, 01:23

10

9

3,789

by: bumpbot

19 Aug 2025, 17:47

ER

A group of six friends noticed that the sum of their ages is the squar

805+ (Hard) | Number Properties, Statistics and Sets Problems

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

dynmoz

15 Aug 2018, 01:08

7

3

3,790

by: bumpbot

14 Oct 2024, 14:10

ER

A person invests an equal amount of money in two investment schemes fo

505-555 (Easy) | Percent and Interest Problems

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

Bunuel

05 Jun 2020, 08:14

1

4

3,790

by: bumpbot

06 Jul 2025, 19:32

ER

What is the difference between the mode and the median of a list of in

805+ (Hard) | Statistics and Sets Problems

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

Aabhash777

12 Jan 2023, 01:59

4

2

3,791

by: bumpbot

10 Jan 2026, 15:45

ER

x and y are prime numbers such that 9 < x < 100 and y is the reverse

805+ (Hard) | Number Properties

805+ (Hard) | Number Properties hide tags

Bunuel

07 Nov 2019, 03:32

12

5

3,792

by: bumpbot

14 Dec 2024, 03:31

ER

Is |x| + |y| > |x - y| ?

655-705 (Hard) | Absolute Values, Inequalities

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

Bunuel

06 Jun 2016, 04:10

21

9

3,793

by: bumpbot

07 Dec 2021, 01:59

ER

Is 2 < xy < 20?

555-605 (Medium) | Inequalities

555-605 (Medium) | Inequalities hide tags

BrentGMATPrepNow

20 May 2018, 08:56

8

4

3,794

by: bumpbot

10 Feb 2024, 01:56

ER

If there are 400 women at College X and 200 students live off-campus

705-805 (Hard) | Overlapping Sets

705-805 (Hard) | Overlapping Sets hide tags

Bunuel

13 Apr 2022, 06:30

21

6

3,794

by: bumpbot

10 Nov 2025, 07:11

ER

In the coordinate plane (pictured above), Line J has a slope of m . Do

555-605 (Medium) | Coordinate Plane

555-605 (Medium) | Coordinate Plane hide tags

Bunuel

26 May 2018, 07:46

19

4

3,795

by: abhinav2892

26 May 2018, 19:24

ER

Stark and Roggers are both baking pies. stark can make M pies per hour

655-705 (Hard) | Work and Rate Problems

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

Abhi077

04 Oct 2018, 21:10

22

5

3,795

by: chetan2u

29 Sep 2023, 04:32

ER

x is a positive integer greater than two; is (x^3 + 19837)(x^2 + 5)(x

705-805 (Hard) | Number Properties

705-805 (Hard) | Number Properties hide tags

Bunuel

26 Jun 2015, 02:07

7

13

3,797

by: bumpbot

20 Dec 2019, 00:03

ER

x is a nonzero number. Is xy < 0?

555-605 (Medium) | Inequalities

555-605 (Medium) | Inequalities hide tags

Bunuel

04 Feb 2015, 08:43

7

9

3,797

by: bumpbot

24 Jan 2022, 11:38

Is j-k > 1/j - 1/k ?

Poor Quality

Poor Quality hide tags

guerrero25

13 Apr 2013, 12:00

4

5

3,798

by: mau5

15 Apr 2013, 11:09

ER

Three circles are drawn within triangle ABC such that no two circles

705-805 (Hard) | Geometry

705-805 (Hard) | Geometry hide tags

Bunuel

08 Mar 2018, 21:20

12

3

3,798

by: bumpbot

31 Mar 2021, 15:27

ER

ABC is an equilateral triangle, and point D is the midpoint of side BC

805+ (Hard) | Geometry

805+ (Hard) | Geometry hide tags

Bunuel

11 Apr 2022, 01:30

10

6

3,798

by: figjam786

05 Aug 2022, 12:55

ER

Two cars are racing along two concentric circular paths. What is the r

605-655 (Medium) | Geometry

605-655 (Medium) | Geometry hide tags

duahsolo

12 Dec 2016, 04:28

7

5

3,798

by: bumpbot

16 Sep 2023, 07:51

ER

What is the sum of positive integers x and y?

655-705 (Hard) | Algebra

655-705 (Hard) | Algebra hide tags

Bunuel

01 May 2019, 03:20

10

4

3,799

by: bumpbot

16 May 2023, 08:03

ER

Adam, Bob, Carl, David, Eric, Frank, George, and Hank are basketball p

505-555 (Easy) | Inequalities

505-555 (Easy) | Inequalities hide tags

Bunuel

19 Jul 2019, 01:26

2

3,801

by: Sajjad1994

21 Sep 2019, 23:04

ER

In the xy-plane, line k intercepts x-axis at (a, 0) and y-axis at (b,

555-605 (Medium) | Coordinate Plane

555-605 (Medium) | Coordinate Plane hide tags

Bunuel

03 Oct 2019, 03:04

4

3

3,801

by: bumpbot

09 May 2023, 09:44

ER

If b is a positive integer less than 10 and x = 1 + b/100, what is the

705-805 (Hard) | Number Properties

705-805 (Hard) | Number Properties hide tags

Bunuel

07 Apr 2021, 16:21

6

4

3,801

by: Bonojit

12 Jun 2023, 23:31

ER

If F, G and H are positive integers. F/6 + G/4 = H/12, do H and 12 hav

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

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

Bunuel

19 Dec 2019, 04:03

4

3

3,801

by: bumpbot

01 Dec 2023, 12:54

ER

If Aidan were 10 years older, he would be twice as old as Tucker. Is A

705-805 (Hard) | Word Problems

705-805 (Hard) | Word Problems hide tags

Bunuel

27 Jul 2017, 01:43

2

4

3,801

by: bumpbot

08 Mar 2026, 21:01

ER

If a, b, and c are constants, how many different numbers y are there

805+ (Hard) | Algebra

805+ (Hard) | Algebra hide tags

Bunuel

10 Nov 2022, 12:13

18

9

3,802

by: bumpbot

18 Oct 2023, 05:03

ER

If the 3rd term of sequence A is 15, what is the 2nd term?

555-605 (Medium) | Sequences

555-605 (Medium) | Sequences hide tags

EMPOWERgmatRichC

04 Oct 2019, 16:40

9

7

3,802

by: bumpbot

05 Jul 2024, 23:10

ER

What is the value of x^2 - 2x - 14 ? (1) x < 0 (2) (x - 5)(x + 3) = 0

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

Bunuel

19 Nov 2019, 01:56

4

6

3,803

by: bumpbot

03 Aug 2021, 01:02

ER

If x 0, is |x|/x < 1? (1) x < 1 (2) x > 1

555-605 (Medium) | Absolute Values, Inequalities

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

Bunuel

08 May 2020, 13:38

11

8

3,803

by: bumpbot

08 Apr 2023, 01:41

ER

Is x y? (1) x(x - y) = 5 (2) x - y < 0

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

goodyear2013

21 Jan 2014, 00:45

6

5

3,804

by: bumpbot

30 Sep 2020, 11:30

ER

The sides AC and BC of ∆ABC are parallel, respectively, to

505-555 (Easy) | Geometry

505-555 (Easy) | Geometry hide tags

Asifpirlo

11 Dec 2013, 02:40

7

3,804

by: bumpbot

26 Sep 2023, 02:22

ER

What fraction of the cookies in a certain bakery’s window display cont

505-555 (Easy) | Fractions and Ratios

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

Sajjad1994

20 Mar 2017, 23:59

8

2

3,806

by: BrentGMATPrepNow

13 Nov 2019, 07:36

ER

How many employees are there in Company X? (1) If an employee is to be

505-555 (Easy) | Probability

505-555 (Easy) | Probability hide tags

Bunuel

24 Oct 2018, 05:17

12

4

3,806

by: bumpbot

01 May 2021, 11:14

In the equation x^2 − cx + c = 0, c is a constant, and x is a variable

655-705 (Hard) | Algebra

655-705 (Hard) | Algebra hide tags

FridaElisa

06 Jul 2020, 00:00

9

3,807

by: FridaElisa

13 Jul 2020, 08:03

ER

If each of w, x, y and z are positive numbers, is w/x*y/z > y/x ?

555-605 (Medium) | Inequalities

555-605 (Medium) | Inequalities hide tags

Bunuel

05 Nov 2018, 00:10

4

3

3,807

by: bumpbot

29 Apr 2021, 20:21

ER

Three hoses, x, y, and z, each pump water at a constant rate into a 70

Sub 505 (Easy) | Work and Rate Problems

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

Bunuel

16 Jan 2017, 09:36

7

6

3,808

by: bumpbot

19 Aug 2020, 08:45

ER

Is 3x − y + z greater than 2x − y + 2z?

505-555 (Easy) | Number Properties

505-555 (Easy) | Number Properties hide tags

Chembeti

12 Jun 2013, 03:27

3

6

3,808

by: Bunuel

30 Sep 2020, 01:26

ER

What is the perimeter of triangle ADC? (1) AD is a median in ΔABC.

555-605 (Medium) | Geometry

555-605 (Medium) | Geometry hide tags

Bunuel

03 Aug 2021, 01:30

6

3,808

by: Fdambro294

29 Aug 2021, 00:35

ER

p is a natural number, is (8p+1) prime

805+ (Hard) | Number Properties

805+ (Hard) | Number Properties hide tags

uchihaitachi

30 Dec 2019, 07:10

8

5

3,809

by: bumpbot

14 Jul 2024, 06:51

ER

What is the value of positive integer m?

805+ (Hard) | Remainders

805+ (Hard) | Remainders hide tags

vdm

14 Sep 2015, 07:48

19

10

3,810

by: bumpbot

16 Dec 2023, 09:39

ER

In the diagram below, what is the measure of ∠BCD?

505-555 (Easy) | Geometry

505-555 (Easy) | Geometry hide tags

Bunuel

24 Jul 2017, 23:17

2

5

3,811

by: sasyaharry

07 Nov 2017, 11:15

ER

At a certain fiorist shop, roses can be purchased either individually

805+ (Hard) | Word Problems

805+ (Hard) | Word Problems hide tags

Bunuel

11 Aug 2021, 08:30

14

4

3,811

by: Annukiran

17 Dec 2025, 02:23

ER

If |x+1|=|y+1|, what is the value of x+y? 1) xy<0

705-805 (Hard) | Absolute Values

705-805 (Hard) | Absolute Values hide tags

MathRevolution

20 Dec 2017, 01:53

16

5

3,812

by: gmatophobia

07 Jul 2023, 09:33

If m and n are two positive integers, then what is the value of mn ?

555-605 (Medium) | Algebra

555-605 (Medium) | Algebra hide tags

prashanths

24 Jun 2019, 05:29

3

4

3,813

by: Staphyk

24 Jun 2019, 06:19

ER

If gasoline costs $1.09 per gallon and alcohol costs $1.81, what fract

555-605 (Medium) | Fractions and Ratios, Word Problems

555-605 (Medium) | Fractions and Ratios, Word Problems hide tags

Bunuel

14 Feb 2016, 11:10

12

5

3,813

by: Tonkotsu

06 Feb 2021, 10:34