Data Sufficiency (DS)

02 Oct 2025, 01:36

7!! ER

100 Hardest and easiest questions for DS as of October 2025

1, 2

Bunuel

21 Aug 2015, 03:42

842

24

183,713

16 Sep 2025, 06:05

7!! ER

DS Question Directory by Topic and Difficulty

bb

07 Mar 2012, 08:58

1,506

0

480,546

by: bb

07 Mar 2012, 08:58

7!! ER

Is P even?

805+ Level | Number Properties

805+ Level | Number Properties hide tags

sb0541

22 Oct 2016, 07:05

11

4

5,673

21 Nov 2017, 15:49

7!! ER

What is the perimeter of a rectangle with length L and width w

555-605 Level | Geometry

555-605 Level | Geometry hide tags

HKD1710

14 Jan 2017, 07:19

1

2

2,864

23 Nov 2017, 16:10

7!! ER

A team of three sales professionals, X, Y , and Z, divided a

555-605 Level | Fractions and Ratios

555-605 Level | Fractions and Ratios hide tags

enigma123

19 Mar 2012, 05:26

1

3

2,636

24 Nov 2017, 00:34

7!! ER

A group ticket for admission to art gallery A costs $p for up to 10 pe

605-655 Level | Inequalities

605-655 Level | Inequalities hide tags

MathRevolution

22 Nov 2017, 02:15

2

3

1,403

by: MathRevolution

24 Nov 2017, 01:20

7!! ER

If x < y < z, what is the value of x?

505-555 Level | Statistics and Sets Problems

505-555 Level | Statistics and Sets Problems hide tags

Bunuel

24 Nov 2017, 00:10

2

1,293

24 Nov 2017, 08:31

7!! ER

ab = 0?

655-705 Level | Algebra

655-705 Level | Algebra hide tags

Creeper300

07 Nov 2010, 13:49

10

3

4,340

by: MathRevolution

24 Nov 2017, 16:25

7!! ER

How many of the employees at Company X have life insurance? (1) There

Sub 505 Level | Fractions and Ratios

Sub 505 Level | Fractions and Ratios hide tags

Sajjad1994

21 Mar 2017, 10:53

3

2,128

25 Nov 2017, 23:27

7!! ER

If a, b, and c are positive numbers, is a < b < c?

555-605 Level | Algebra

555-605 Level | Algebra hide tags

Smita04

13 Apr 2012, 22:21

1

3

3,372

by: MathRevolution

26 Nov 2017, 11:25

7!! ER

What is the units digit of the positive integer y?

555-605 Level | Fractions and Ratios, Number Properties

555-605 Level | Fractions and Ratios, Number Properties hide tags

Bunuel

27 Nov 2017, 00:09

2

1

1,273

by: Sasindran

27 Nov 2017, 00:12

7!! ER

If n is a positive integer, is n odd?

505-555 Level | Number Properties

505-555 Level | Number Properties hide tags

gmatmania17

29 Dec 2014, 03:50

2

3

3,055

27 Nov 2017, 12:09

7!! ER

If x, y, p, and q are positive, is x >= y?

Sub 505 Level | Algebra, Inequalities

Sub 505 Level | Algebra, Inequalities hide tags

blover

21 Dec 2009, 12:58

1

6

9,328

27 Nov 2017, 12:42

7!! ER

A T-shirt and a pair of jeans cost a total of $72.96. How much does th

Sub 505 Level | Word Problems

Sub 505 Level | Word Problems hide tags

Bunuel

06 Jan 2017, 02:55

2

2,032

27 Nov 2017, 13:01

7!! ER

If there are x students in a class and x>90, what is x?

555-605 Level | Multiples and Factors, Number Properties

555-605 Level | Multiples and Factors, Number Properties hide tags

chetan2u

16 Nov 2017, 09:32

1

2

1,652

by: chetan2u

27 Nov 2017, 18:50

7!! ER

What is the value of x? (1) x^6 = 729 (2) x^5 < x^4

505-555 Level | Inequalities

505-555 Level | Inequalities hide tags

Bunuel

12 Oct 2017, 23:21

3

4

2,731

by: JeffTargetTestPrep

27 Nov 2017, 19:13

7!! ER

In the circle with center C above, what is the area of right triangle

555-605 Level | Geometry

555-605 Level | Geometry hide tags

Bunuel

24 Jan 2016, 06:22

4

2

2,295

27 Nov 2017, 23:24

7!! ER

If the Perimeter of Quadrilateral ABCD is P then find P? 1) The maxim

655-705 Level | Geometry

655-705 Level | Geometry hide tags

GMATinsight

18 Nov 2017, 05:33

5

2

2,317

27 Nov 2017, 23:34

7!! ER

Are x and y both negative? (1) 3x - 3y = 1 (2) x/y < 1

655-705 Level | Inequalities

655-705 Level | Inequalities hide tags

Bunuel

26 Nov 2017, 23:27

2

5

2,257

28 Nov 2017, 23:24

7!! ER

If x is negative, is x <-3? (1) x^2 > 9 (2) x^3 <

555-605 Level | Inequalities

555-605 Level | Inequalities hide tags

IEsailor

19 May 2011, 00:17

20

10

7,493

29 Nov 2017, 00:47

7!! ER

If z is an integer, is y an integer?

555-605 Level | Inequalities, Number Properties

555-605 Level | Inequalities, Number Properties hide tags

chetan2u

29 Nov 2017, 19:01

3

1,617

29 Nov 2017, 22:29

7!! ER

Data Sufficiency Pack 4, Question 3) On a number line...

655-705 Level | Absolute Values, Number Properties

655-705 Level | Absolute Values, Number Properties hide tags

EMPOWERgmatRichC

20 Nov 2015, 15:23

7

4

3,703

30 Nov 2017, 20:47

7!! ER

If b is not negative, is b an integer? (1) b^2 < 1 (2) b^4 < 1

555-605 Level | Inequalities

555-605 Level | Inequalities hide tags

Bunuel

03 Dec 2017, 00:07

1

1,056

03 Dec 2017, 00:29

7!! ER

Is a/b > c/d? (1) a < b (2) c > d

555-605 Level | Inequalities

555-605 Level | Inequalities hide tags

Bunuel

03 Dec 2017, 01:35

2

1,870

03 Dec 2017, 09:57

7!! ER

Is x < 0? (1) x + 2 > 0 (2) 2x > 3x

505-555 Level | Inequalities

505-555 Level | Inequalities hide tags

Bunuel

03 Dec 2017, 06:27

2

1,554

03 Dec 2017, 12:06

7!! ER

What is the volume of rectangular box Q? (1) Two adjacent

555-605 Level | Geometry

555-605 Level | Geometry hide tags

guygmat

19 Jun 2011, 08:02

2

3

4,007

04 Dec 2017, 00:21

7!! ER

Is the probability of Event A greater than 0.5

805+ Level | Probability

805+ Level | Probability hide tags

Gnpth

28 Nov 2017, 18:21

13

12

5,076

by: mikemcgarry

04 Dec 2017, 17:30

7!! ER

Given that kp = 48, what is the value of k + p?

605-655 Level | Number Properties

605-655 Level | Number Properties hide tags

Bunuel

03 Dec 2017, 23:50

2

1,612

by: akadiyan

05 Dec 2017, 16:55

7!! ER

If x + y is an integer, is y an integer?

605-655 Level | Number Properties

605-655 Level | Number Properties hide tags

jamifahad

18 Jul 2011, 05:10

6

3,229

06 Dec 2017, 00:45

7!! ER

Is the number of seconds required to travel d1 feet at r1

605-655 Level | Fractions and Ratios

605-655 Level | Fractions and Ratios hide tags

chiragatara

21 Nov 2010, 01:57

147

12

26,317

06 Dec 2017, 02:09

7!!

No wonder Federer lost in his Olympic tennis final, he

805+ Level | Arithmetic, Word Problems

805+ Level | Arithmetic, Word Problems hide tags

EvaJager

06 Aug 2012, 06:46

10

13

4,225

06 Dec 2017, 06:39

7!! ER

If x is an integer, is x^3 divisible by 49?

555-605 Level | Multiples and Factors

555-605 Level | Multiples and Factors hide tags

Bunuel

05 Dec 2017, 21:55

1

4

1,662

by: lovenish

06 Dec 2017, 23:06

7!! ER

If n denotes a decimal, then is n > 0.9? (1) When n is

555-605 Level | Number Properties

555-605 Level | Number Properties hide tags

aiming4mba

22 Jul 2010, 13:08

2

2,929

09 Dec 2017, 16:33

7!! ER

If yz = 6, what is the value of yz(y + z) ?

555-605 Level | Algebra

555-605 Level | Algebra hide tags

Bunuel

10 Dec 2017, 01:14

1

1,754

by: niks18

10 Dec 2017, 03:40

7!! ER

Is t^(1/2) an even integer? (1) t is equal to m^2. (2) m is an even in

505-555 Level | Number Properties

505-555 Level | Number Properties hide tags

Bunuel

10 Dec 2017, 01:09

1

1,105

by: niks18

10 Dec 2017, 03:46

7!! ER

Bob purchased 18 cans of soda, some of which contained diet soda. How

Sub 505 Level | Word Problems

Sub 505 Level | Word Problems hide tags

Sajjad1994

19 Feb 2017, 05:07

10

3

8,140

10 Dec 2017, 14:28

7!! ER

Is a < -1?

655-705 Level | Absolute Values, Inequalities

655-705 Level | Absolute Values, Inequalities hide tags

chetan2u

02 Nov 2017, 09:51

2

5

2,385

11 Dec 2017, 05:44

7!! ER

If x is less than 80 percent of y, is x less than 100 ? (1)

655-705 Level | Inequalities, Percent and Interest Problems

655-705 Level | Inequalities, Percent and Interest Problems hide tags

rxs0005

22 Jan 2011, 07:08

6

3

3,685

12 Dec 2017, 05:58

7!! ER

What is the value of a - b ? (1) a^2 - 2ab + b^2 = 16 (2) |a - b| = 4

505-555 Level | Absolute Values, Algebra

505-555 Level | Absolute Values, Algebra hide tags

Bunuel

12 Dec 2017, 05:55

3

1

2,330

by: chetan2u

12 Dec 2017, 06:27

7!! ER

What is the value of xy ? (1) The average of x and y is 7. (2) The ave

505-555 Level | Algebra, Statistics and Sets Problems

505-555 Level | Algebra, Statistics and Sets Problems hide tags

Bunuel

10 Dec 2017, 01:11

2

1,484

by: alphastallion

12 Dec 2017, 16:54

7!! ER

If m and n are integers, is m + n divisible by 3?

Sub 505 Level | Multiples and Factors

Sub 505 Level | Multiples and Factors hide tags

Bunuel

12 Dec 2017, 05:53

1

2

2,370

by: Alexey1989x

13 Dec 2017, 03:01

7!! ER

If n is an integer and n^3 is between 1 and 100, inclusive, what is

555-605 Level | Number Properties

555-605 Level | Number Properties hide tags

meshell

10 Aug 2011, 13:56

3

14

5,230

13 Dec 2017, 23:44

7!! ER

If x, y, and z are three integers, are they consecutive integers?

555-605 Level | Multiples and Factors, Number Properties

555-605 Level | Multiples and Factors, Number Properties hide tags

Bunuel

10 Dec 2017, 00:51

2

6

2,016

by: dineshril

14 Dec 2017, 11:26

7!! ER

If x ≠ 0, what is the value of (x^p/x^q)^3 ? (1) p - q = 1 (2) x = 4

505-555 Level | Exponents

505-555 Level | Exponents hide tags

Bunuel

16 Dec 2017, 01:51

2

2,510

16 Dec 2017, 09:18

7!! ER

CMAT scores are calculated as per the following rule 1) Raw score is c

505-555 Level | Fractions and Ratios +2 tags

505-555 Level | Fractions and Ratios, Number Properties, Word Problems hide tags

GMATinsight

17 Dec 2017, 06:50

3

2,358

by: roykabir772

17 Dec 2017, 07:48

7!! ER

In the figure above, what is the value of x + y?

555-605 Level | Geometry

555-605 Level | Geometry hide tags

Sajjad1994

16 Dec 2017, 12:37

4

2,245

17 Dec 2017, 09:12

7!! ER

What is the ratio of area of triangle BOC to area of triangle AOC ,

555-605 Level | Coordinate Plane, Geometry

555-605 Level | Coordinate Plane, Geometry hide tags

chetan2u

17 Dec 2017, 04:15

3

2,800

17 Dec 2017, 22:04

7!! ER

Is xy <= 6 ? (1) 1 <= x <= 2 and 4 <= y <= 6 (2) x + y = 7

555-605 Level | Inequalities

555-605 Level | Inequalities hide tags

Bunuel

16 Dec 2017, 01:46

3

6

2,509

18 Dec 2017, 03:06

7!! ER

Is m+10 positive?

Poor Quality

Poor Quality hide tags

sandysilva

18 Dec 2017, 02:58

7

1,734

by: sandysilva

18 Dec 2017, 07:58

7!! ER

Is x divisible by 9?

555-605 Level | Multiples and Factors, Remainders

555-605 Level | Multiples and Factors, Remainders hide tags

Bunuel

07 Feb 2016, 10:49

1

3

3,886