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

Bottles A and B contain alcohol-water solutions in ratios of 1:3 and

555-605 Level | Mixture Problems

555-605 Level | Mixture Problems hide tags

Bunuel

11 Oct 2024, 01:30

9

3

1,846

11 Oct 2024, 14:49

7!! ER

For Company A, by what percent did profit increase this year over last

605-655 Level | Percent and Interest Problems

605-655 Level | Percent and Interest Problems hide tags

Bunuel

10 Oct 2024, 01:30

7

3

1,997

by: Nipun1294

28 Oct 2024, 14:59

7!! ER

A boy goes to a supermarket and buys some pencils and erasers.

705-805 Level | Word Problems

705-805 Level | Word Problems hide tags

Bunuel

10 Oct 2024, 01:30

8

4

1,671

by: jmaxr

01 May 2025, 12:20

7!! ER

In every week, the Shopping mall bookstore's salesman is paid a fixed

605-655 Level | Word Problems

605-655 Level | Word Problems hide tags

Bunuel

09 Oct 2024, 01:30

4

3

977

09 Oct 2024, 15:26

7!! ER

Four balls A, B, C and D are of different colours and are kept in

605-655 Level | Word Problems

605-655 Level | Word Problems hide tags

Bunuel

09 Oct 2024, 01:30

2

1,216

09 Oct 2024, 15:20

7!! ER

The course grade for a mathematics course consists of 60 percent of

605-655 Level | Word Problems

605-655 Level | Word Problems hide tags

GMAT695

09 Oct 2024, 00:10

24

6

5,442

31 May 2025, 11:33

7!! ER

Emma and Deep are painting a wall. Emma started painting the wall

655-705 Level | Work and Rate Problems

655-705 Level | Work and Rate Problems hide tags

Bunuel

08 Oct 2024, 01:30

17

3

1,680

by: Reetisha

19 Nov 2025, 23:28

7!! ER

The price of martha's meal was $10, and she left a tip that was r

555-605 Level | Percent and Interest Problems

555-605 Level | Percent and Interest Problems hide tags

Bunuel

08 Oct 2024, 01:30

3

1,117

by: prantorboni

08 Oct 2024, 22:17

7!! ER

How many people in a society of 500 own both a bike and a car?

705-805 Level | Overlapping Sets

705-805 Level | Overlapping Sets hide tags

Bunuel

07 Oct 2024, 01:30

4

3

1,476

by: pierjoejoe

17 Oct 2024, 03:42

7!! ER

Larry invested $20,000 in an investment that earned an annual

805+ Level | Percent and Interest Problems

805+ Level | Percent and Interest Problems hide tags

Bunuel

07 Oct 2024, 01:30

13

8

1,806

by: NoeticImbecile

14 Apr 2025, 03:01

7!! ER

Amanda wishes to buy a new computer for herself this year. She can

655-705 Level | Word Problems

655-705 Level | Word Problems hide tags

Bunuel

04 Oct 2024, 01:30

12

2

1,575

06 Nov 2025, 11:26

7!! ER

50 machines work in parallel and no-stop. Each machine can produce

655-705 Level | Work and Rate Problems

655-705 Level | Work and Rate Problems hide tags

Bunuel

04 Oct 2024, 01:30

11

5

1,453

by: prantorboni

06 Oct 2024, 22:37

7!! ER

If the work rate of each person is identical, how long it takes for 5

605-655 Level | Work and Rate Problems

605-655 Level | Work and Rate Problems hide tags

Bunuel

03 Oct 2024, 01:30

4

1

1,223

03 Oct 2024, 09:56

7!! ER

Pump A and B together put water in the empty tank of which volume is

655-705 Level | Work and Rate Problems

655-705 Level | Work and Rate Problems hide tags

Bunuel

03 Oct 2024, 01:30

10

2

1,317

28 Oct 2025, 13:48

7!! ER

In a recent trip, Morris drove from town A to town B and returned back

555-605 Level | Distance and Speed Problems

555-605 Level | Distance and Speed Problems hide tags

Bunuel

02 Oct 2024, 01:30

4

3

998

by: tgsankar10

04 Oct 2024, 00:29

7!! ER

Can a batch of identical cookies be divided evenly between Laurel and

555-605 Level | Word Problems

555-605 Level | Word Problems hide tags

Bunuel

02 Oct 2024, 01:30

3

2

1,298

by: stne

05 Oct 2024, 09:25

7!! ER

At a history museum, the price of each regular admission ticket sold

655-705 Level | Word Problems

655-705 Level | Word Problems hide tags

GMAT695

01 Oct 2024, 02:20

32

4

6,122

by: unraveled

24 Nov 2024, 08:27

7!! ER

What was Johns age on 1st January, 1992? (1) The average age of John

655-705 Level | Word Problems

655-705 Level | Word Problems hide tags

Bunuel

01 Oct 2024, 01:30

9

4

1,701

by: Ertucinar

04 Mar 2025, 03:25

7!! ER

Jane drove at a constant speed from point A to point B and back to

705-805 Level | Distance and Speed Problems

705-805 Level | Distance and Speed Problems hide tags

Bunuel

01 Oct 2024, 01:30

10

3

2,215

27 Oct 2025, 07:02

7!! ER

A sports goods manufacturing company sells the same fixed number of

555-605 Level | Word Problems

555-605 Level | Word Problems hide tags

Bunuel

30 Sep 2024, 01:30

3

2

1,226

by: pierjoejoe

13 Oct 2024, 08:08

7!! ER

A person is to be selected at random from the group T of people. What

605-655 Level | Probability

605-655 Level | Probability hide tags

Bunuel

30 Sep 2024, 01:30

14

4

1,911

by: Souravi99

16 Oct 2024, 07:59

7!! ER

Dwight and Elaine are each employed to mow the grass at a certain

655-705 Level | Work and Rate Problems

655-705 Level | Work and Rate Problems hide tags

Bunuel

27 Sep 2024, 01:30

9

3

1,349

14 Nov 2025, 22:25

7!! ER

An automobile dealership sells only sedans and coupes. It sells each

555-605 Level | Word Problems

555-605 Level | Word Problems hide tags

Bunuel

27 Sep 2024, 01:30

9

2

1,332

by: Ratanp

28 Sep 2024, 08:40

7!! ER

What is the total cost to make 7 long distance telephone calls?

505-555 Level | Word Problems

505-555 Level | Word Problems hide tags

Bunuel

26 Sep 2024, 01:30

3

1

621

26 Sep 2024, 09:34

7!! ER

How many specially priced boxes of soap powder did a supermarket sell

555-605 Level | Percent and Interest Problems

555-605 Level | Percent and Interest Problems hide tags

Bunuel

26 Sep 2024, 01:30

3

1

1,046

26 Sep 2024, 09:38

7!! ER

A certain granola recipe calls for a simple mixture of raisins costing

555-605 Level | Mixture Problems

555-605 Level | Mixture Problems hide tags

Bunuel

25 Sep 2024, 01:30

10

2

1,551

25 Sep 2024, 10:56

7!! ER

Each week Pat deposits $100 into a savings account, plus 10 percent of

655-705 Level | Percent and Interest Problems

655-705 Level | Percent and Interest Problems hide tags

Bunuel

25 Sep 2024, 01:30

6

3

1,169

by: prantorboni

26 Sep 2024, 00:31

7!! ER

How many cartons of milk does supermarket A have in stock?

555-605 Level | Word Problems

555-605 Level | Word Problems hide tags

Bunuel

24 Sep 2024, 01:30

2

800

24 Sep 2024, 03:03

7!! ER

During a five-day period, Monday through Friday, the average

555-605 Level | Statistics and Sets Problems

555-605 Level | Statistics and Sets Problems hide tags

Bunuel

24 Sep 2024, 01:30

5

6

2,137

13 Dec 2024, 01:01

7!! ER

By what percent has the price of a gallon of gasoline decreased since

555-605 Level | Word Problems

555-605 Level | Word Problems hide tags

Bunuel

23 Sep 2024, 01:30

2

647

by: monster1810

24 Sep 2024, 06:53

7!! ER

The average weight of n students in a certain class was 24 kg. A new

555-605 Level | Statistics and Sets Problems

555-605 Level | Statistics and Sets Problems hide tags

Bunuel

23 Sep 2024, 01:30

3

2

1,378

by: mosetti

24 Sep 2024, 10:42

7!! ER

Is f(x) an increasing function?

705-805 Level | Functions and Custom Characters

705-805 Level | Functions and Custom Characters hide tags

pintukr

20 Sep 2024, 11:38

1

724

20 Sep 2024, 11:41

7!! ER

What is the distance between City A and City B?

555-605 Level | Distance and Speed Problems

555-605 Level | Distance and Speed Problems hide tags

Bunuel

20 Sep 2024, 01:30

5

4

2,288

12 Oct 2024, 00:31

7!! ER

Mr. Hock wanted to buy a car. He had shortlisted 15 cars. What percent

655-705 Level | Overlapping Sets

655-705 Level | Overlapping Sets hide tags

Bunuel

20 Sep 2024, 01:30

2

1,376

by: Akarsh97

29 Sep 2025, 07:08

7!! ER

The average daily maximum temperature at a certain weather station

705-805 Level | Word Problems

705-805 Level | Word Problems hide tags

Bunuel

19 Sep 2024, 01:30

9

2

1,417

15 Oct 2025, 01:41

7!! ER

All customers in a café order either tea or coffee, and some of them

655-705 Level | Overlapping Sets

655-705 Level | Overlapping Sets hide tags

Bunuel

19 Sep 2024, 01:30

3

1

991

by: Sanskar115

19 Sep 2024, 01:53

7!! ER

A drink contains only 7 oz. of soda and 3 oz. of juice. A second drink

605-655 Level | Mixture Problems

605-655 Level | Mixture Problems hide tags

Bunuel

18 Sep 2024, 01:30

9

1

1,643

by: siddhantvarma

19 Sep 2024, 10:40

7!! ER

50 jars sit on a shelf, of which 12 are red and not round; and 30 are

555-605 Level | Overlapping Sets

555-605 Level | Overlapping Sets hide tags

Bunuel

18 Sep 2024, 01:30

2

1

620

18 Sep 2024, 12:42

7!! ER -1

At the beginning of last year, a furniture store had 75 armchairs in

655-705 Level | Word Problems

655-705 Level | Word Problems hide tags

Bunuel

17 Sep 2024, 01:30

6

5

1,774

by: chai9944

25 Dec 2024, 21:39

7!! ER

Of the first three dozen cookies baked at a bake shop on a certain day

655-705 Level | Word Problems

655-705 Level | Word Problems hide tags

Bunuel

17 Sep 2024, 01:30

3

1,357

by: rish_dutton

17 Sep 2024, 19:59

7!! ER

Waugh jogged to a restaurant at x miles per hour, and jogged back home

605-655 Level | Distance and Speed Problems

605-655 Level | Distance and Speed Problems hide tags

Bunuel

16 Sep 2024, 01:30

3

2

1,364

by: Shafkat26

18 Sep 2024, 02:02

7!! ER

If the total price for n copies of a book is $31.50, what is the price

655-705 Level | Word Problems

655-705 Level | Word Problems hide tags

Bunuel

16 Sep 2024, 01:30

1

1,102

16 Sep 2024, 15:52

7!! ER

During a five day charity drive, the least amount of money raised in

605-655 Level | Word Problems

605-655 Level | Word Problems hide tags

Bunuel

13 Sep 2024, 01:30

6

3

1,651

by: pierjoejoe

13 Oct 2024, 01:33

7!! ER

A business bought r typewriters at $100 per typewriter and s

655-705 Level | Word Problems

655-705 Level | Word Problems hide tags

Bunuel

13 Sep 2024, 01:30

9

4

1,342

19 Oct 2025, 19:56

7!! ER

How much precipitation does Springfield need this month to attain its

555-605 Level | Word Problems

555-605 Level | Word Problems hide tags

Bunuel

12 Sep 2024, 01:30

2

3

815

by: Rod728

13 Sep 2024, 15:39

7!! ER

Johns Pack and Ship uses price discrimination to capture consumer

555-605 Level | Word Problems

555-605 Level | Word Problems hide tags

Bunuel

12 Sep 2024, 01:30

3

2

948

by: Rahilgaur

12 Sep 2024, 23:44

7!! ER

Kevin buys beer in bottles and cans. He pays $1.00 for each can of

555-605 Level | Word Problems

555-605 Level | Word Problems hide tags

Bunuel

11 Sep 2024, 01:30

2

3

842