100 Hardest and easiest questions for DS as of March 2024 : Data Sufficiency (DS)

2015-08-21T03:42:39-07:00

100 Hardest Data Sufficiency Questions (Mar 1st, 2024 - Apr 1st, 2024)Are you familiar with the GMAT Club's timer?We have pulled timer results from our database and analyzed every question in the forum. Based on those results, we have compiled a list of the hardest questions in each of the question forums we have. Below I am presenting to you the top 100 questions from DS forum.Data Sufficiency (DS)RankTitleTopics1If all the N students of a class are classified into groups of either Difficulty: 805+ Level, Divisibility/Multiples/Factors, Number Properties, Source: e-GMAT2In the correctly worked addition problem above, A, B, C, D Difficulty: 805+ Level, Arithmetic, Number Properties, Source: Manhattan GMAT3A car dealership carries only sedans and SUVs Difficulty: 805+ Level, Percent and Interest Problems, Word Problems, Source: Veritas Prep4The number of elements in set K is an odd number. The minimum value of Difficulty: 805+ Level, Statistics and Sets Problems, Source: Math Revolution5n and k are positive integers. When n is divided by 23, the quotient i Difficulty: 805+ Level, Remainders, Source: GMAT Prep Now6P and Q are prime numbers less than 70. What is the units digit of P*Q Difficulty: 805+ Level, Number Properties, Source: e-GMAT7There is a sequence, 4(10^n), 4(10^(n-1)), ..., 4(10^(n-m)), for posit Difficulty: 805+ Level, Number Properties, Sequences, Source: Math Revolution8For positive integers n and m (n>m), is the average (arithmetic mean) Difficulty: 805+ Level, Number Properties, Statistics and Sets Problems, Source: Math Revolution9A three digit number A with hundreds digit a, tens digit b and units Difficulty: 805+ Level, Divisibility/Multiples/Factors, Number Properties, Source: Jamboree10The average (arithmetic mean) of 5 distinct, single digit integers is Difficulty: 805+ Level, Number Properties, Source: Princeton Review1112 Days of Christmas GMAT Competition - Day 8: Set X = {a, b, c, d, 9} Difficulty: 805+ Level, Statistics and Sets Problems, Source: Competition Questions, Source: GMAT Club Tests12Superfast train A leaves Newcastle for Birmingham at 3 PM and travels Difficulty: 805+ Level, Distance/Rate Problems, Source: Veritas Prep13If a and b are two-digit positive integers greater than 10 Difficulty: 805+ Level, Remainders, Source: GMAT Club Tests14Bob and Wendy left home to walk together to a restaurant for Difficulty: 805+ Level, Distance/Rate Problems, Source: Manhattan GMAT15W, X, Y, and Z represent distinct digits such that WX * YZ = 1995. Wha Difficulty: 805+ Level, Number Properties, Source: Veritas Prep16X is a three-digit positive integer in which each digit is either 1 or Difficulty: 805+ Level, Fractions/Ratios/Decimals, Remainders, Source: Manhattan GMAT17Abe, Beth, Carl and Duncan are four siblings, among which Abe and Carl Difficulty: 805+ Level, Number Properties, Source: e-GMAT18b, c, d, e, f and g are different positive integers. When b is divided Difficulty: 805+ Level, Remainders, Source: GMAT Prep Now19In the number 13,52#,@ and # represent distinct digits. Difficulty: 805+ Level, Arithmetic, Divisibility/Multiples/Factors, Source: Princeton Review20Julian bought 6 kilograms of cheese from each of Deli A and Deli B. At Difficulty: 805+ Level, Word Problems, Source: 800 Score21A newer machine, working alone at its constant rate Difficulty: 805+ Level, Work/Rate Problems, Source: Veritas Prep22If x, y and z are positive integers such that x^4*y^3 = z^2 Difficulty: 805+ Level, Number Properties, Source: e-GMAT23The average (arithmetic mean) of the original six prices for six coats Difficulty: 805+ Level, Word Problems, Source: Manhattan GMAT24If a, b, and c are integers such that 0 < a < b < c < 10, is Difficulty: 805+ Level, Divisibility/Multiples/Factors, Source: Manhattan GMAT25GMAT CLUB OLYMPICS: In a survey of an Olympic team members, 1/6th of Difficulty: 805+ Level, Overlapping Sets, Source: Competition Questions, Source: GMAT Club Tests26A car manufacturer organized a test drive of two of its prototypes. Difficulty: 805+ Level, Statistics and Sets Problems, Source: CrackVerbal27Positive integers a, b and c are all less than 10. If the sum of all Difficulty: 805+ Level, Arithmetic, Combinations, Number Properties, Source: GMAT Club Tests28x, y are positive integers. Find the number of even factors of 4x^2 Difficulty: 805+ Level, Divisibility/Multiples/Factors, Source: e-GMAT29In the correctly-worked multiplication problem above, each Difficulty: 805+ Level, Number Properties, Source: Veritas Prep30The average (arithmetic mean) of the original six prices for six coats Difficulty: 805+ Level, Statistics and Sets Problems, Source: Manhattan GMAT31Between 1980 and 1985, Pierre’s investment portfolio increas Difficulty: 805+ Level, Percent and Interest Problems, Source: Princeton Review32In the correctly-worked multiplication problem above, each symbol repr Difficulty: 805+ Level, Arithmetic, Number Properties, Source: Veritas Prep33Jeff drove two laps around a track. Was his average speed less than 60 Difficulty: 805+ Level, Distance/Rate Problems, Source: Manhattan GMAT34If a and b are positive integers, what is the remainder when ab is Difficulty: 805+ Level, Divisibility/Multiples/Factors, Number Properties, Remainders, Source: Manhattan GMAT35A certain diet program calls for eating daily calories from Difficulty: 805+ Level, Word Problems, Source: GMAT Paper Tests36Reiko drove from point A to point B at a constant speed, and Difficulty: 805+ Level, Distance/Rate Problems, Source: Manhattan GMAT37If x, y, and z are integers, and x < y < z, is z y = y Difficulty: 805+ Level, Statistics and Sets Problems, Source: Manhattan GMAT38In the morning, Chris drives from Toronto to Oakville and in the eveni Difficulty: 805+ Level, Distance/Rate Problems, Source: Veritas Prep39At a certain animal shelter, there are nine dogs available for Difficulty: 805+ Level, Probability, Source: GMAT Ninja40In a group of 80 college students, how many own a car? Difficulty: 805+ Level, Overlapping Sets, Source: Magoosh41A certain fruit stand sells only apples for $0.26 each, bananas for $0 Difficulty: 805+ Level, Word Problems, Source: Veritas Prep42If m, n, and p are three-digit integers and m + n = p Difficulty: 805+ Level, Number Properties, Source: Manhattan GMAT43A coin purse contains 13 coins, each worth 1, 5, 10, or 25 cents; the Difficulty: 805+ Level, Word Problems, Source: Manhattan GMAT44Four friends go to Macys for shopping and buy a top each. Three of th Difficulty: 805+ Level, Word Problems, Source: Veritas Prep45Allison always leaves her office at 5.00pm and reaches her Difficulty: 805+ Level, Distance/Rate Problems, Source: Veritas Prep46Is A + B + C even? Difficulty: 805+ Level, Number Properties, Source: GMAT Club Tests47If m and n are non-zero integers, is m6-m5-m4 divisible by n? 1) m2 Difficulty: 805+ Level, Divisibility/Multiples/Factors, Number Properties, Source: Math Revolution48A certain salesman's yearly income is determined by a base salary plus Difficulty: 805+ Level, Percent and Interest Problems, Word Problems, Source: Manhattan GMAT491/3 of golfers also play tennis, 3/5 of tennis players also surf. 4/7 Difficulty: 805+ Level, Fractions/Ratios/Decimals, Overlapping Sets, Probability, Source: Princeton Review50At a particular store, candy bars are normally priced at $1. Difficulty: 805+ Level, Word Problems, Source: Manhattan GMAT51w, x, y and z are positive integers. When w is divided by x, the quoti Difficulty: 805+ Level, Divisibility/Multiples/Factors, Remainders, Source: GMAT Prep Now52Is x divisible by 39? Difficulty: 805+ Level, Divisibility/Multiples/Factors, Remainders, Source: Kaplan53Three positive integers a, b and c leave the same remainder y Difficulty: 805+ Level, Remainders, Source: e-GMAT54If x and y are positive integers, what is the value of x? Difficulty: 805+ Level, Remainders, Source: GMAT Prep Now55Seven water stations were set up at equal intervals along the 42- Difficulty: 805+ Level, Distance/Rate Problems, Source: e-GMAT56If x is a positive integer greater than 1, and y is the smallest posit Difficulty: 805+ Level, Number Properties, Source: Manhattan GMAT57The difference between positive two-digit integer A and the smaller tw Difficulty: 805+ Level, Divisibility/Multiples/Factors, Number Properties, Source: Manhattan GMAT58How many prime factors does positive integer n have? Difficulty: 805+ Level, Divisibility/Multiples/Factors, Number Properties, Source: Veritas Prep59The members of a company’s board of directors must select a subcommitt Difficulty: 805+ Level, Combinations, Source: Kaplan60If 10^a * 3^b * 5^c = 450^n, what is the value of c? Difficulty: 805+ Level, Number Properties, Source: Veritas Prep61Of the 48 students in a class, 16 like to study History. What percenta Difficulty: 805+ Level, Statistics and Sets Problems, Source: e-GMAT62In the sequence a1,a2,…,an,…,a1=x and an=y–zan−1 for all n>1. Is a3>a2 Difficulty: 805+ Level, Sequences, Source: Veritas Prep6312 Days of Christmas GMAT Competition - Day 2: Jingle, an elf Difficulty: 805+ Level, Statistics and Sets Problems, Source: Competition Questions, Source: GMAT Club Tests64Set P consists of the first n positive multiples of 3 and set Q consis Difficulty: 805+ Level, Number Properties, Source: e-GMAT65w, x, y and z are positive integers such that y < z < x < w. Difficulty: 805+ Level, Remainders, Source: GMAT Prep Now66Merle's spare change jar has exactly 16 U.S. coins, each of which is a Difficulty: 805+ Level, Word Problems, Source: Official Guide67GMAT Club World Cup 2022 (DAY 1): Mbappé has two types of sneakers Difficulty: 805+ Level, Word Problems, Source: Competition Questions, Source: GMAT Club Tests68W, X, Y and Z are four different positive integers. Difficulty: 805+ Level, Remainders, Source: GMAT Prep Now69If N is a positive three-digit number that is greater than 2 Difficulty: 805+ Level, Fractions/Ratios/Decimals, Number Properties, Source: Manhattan GMAT70A drawer contains 6 socks. If two socks are randomly Difficulty: 805+ Level, Probability, Source: GMAT Prep Now71Lily has only red and blue balls in a jar. If she removes three balls Difficulty: 805+ Level, Probability, Source: Experts' Global72In the correctly worked addition problem above, M, N, R, S, T and V Difficulty: 805+ Level, Arithmetic, Source: Veritas Prep73GMAT CLUB OLYMPICS: If x > 0, is 1/x a prime number ? Difficulty: 805+ Level, Divisibility/Multiples/Factors, Number Properties, Source: Competition Questions, Source: GMAT Club Tests74Six numbers are randomly selected and placed within a set. If the set Difficulty: 805+ Level, Statistics and Sets Problems, Source: Princeton Review75Julie wants to be sure that she has enough pies for each of her Difficulty: 805+ Level, Word Problems, Source: Manhattan GMAT76There are 6 floors in an apartment building. Difficulty: 805+ Level, Word Problems, Source: Magoosh77GMAT Club World Cup 2022 (DAY 10): On a joint company picnic, 160 Difficulty: 805+ Level, Word Problems, Source: Competition Questions, Source: GMAT Club Tests78Students in a class are arranged to form groups of 4 members each Difficulty: 805+ Level, Remainders, Source: Veritas Prep79A dental licensure exam requires a 75% minimum score in orde Difficulty: 805+ Level, Fractions/Ratios/Decimals, Word Problems, Source: Veritas Prep80Each of seven consecutive integers, all greater than positive integer Difficulty: 805+ Level, Divisibility/Multiples/Factors, Number Properties, Statistics and Sets Problems, Source: Manhattan GMAT81Events A and B are independent and have equal probabilities Difficulty: 805+ Level, Probability, Source: Veritas Prep82A nonprofit group organizes its local fundraisers in teams, Difficulty: 805+ Level, Word Problems, Source: Veritas Prep83During a certain game, after each turn, a player’s points are doubled Difficulty: 805+ Level, Word Problems, Source: Veritas Prep84If x is a positive integer greater than 1, is x a prime numb Difficulty: 805+ Level, Divisibility/Multiples/Factors, Number Properties, Source: GMAT Club Tests85If A and B are integers, is the product AB even? Difficulty: 805+ Level, Number Properties, Source: e-GMAT86If x, y, and z are positive integers, where x > y and z = √x Difficulty: 805+ Level, Number Properties, Source: Kaplan87GMAT CLUB OLYMPICS: If x is a positive integer greater than 3 and x^4 Difficulty: 805+ Level, Divisibility/Multiples/Factors, Remainders, Source: Competition Questions, Source: GMAT Club Tests88One-sixth of the orders placed at a take-out restaurant on Friday nigh Difficulty: 805+ Level, Word Problems, Source: Magoosh89HOT Competition: If n is a positive integer, then n is a multiple of Difficulty: 805+ Level, Divisibility/Multiples/Factors, Number Properties, Source: Competition Questions, Source: GMATWhiz90There are six consecutive positive integers in Set S. What Difficulty: 805+ Level, Remainders, Source: Manhattan GMAT91If x and y are both integers greater than 1, is xy>100 ? Difficulty: 805+ Level, Divisibility/Multiples/Factors, Number Properties, Source: Veritas Prep92For positive integers n and m (n>m), is the average (arithmetic mean) Difficulty: 805+ Level, Number Properties, Source: Math Revolution93If a, b and n are positive integers such that n = 3a – b3 Difficulty: 805+ Level, Number Properties, Source: e-GMAT9412 Days of Christmas GMAT Competition - Day 5: When positive integer x Difficulty: 805+ Level, Remainders, Source: Competition Questions, Source: GMAT Club Tests95A group of people is seated at a table at which a toast is made. Follo Difficulty: 805+ Level, Combinations, Source: Princeton Review96The sum of the integers in list S is the same as the sum of the intege Difficulty: 805+ Level, Statistics and Sets Problems, Source: GMAT Prep97If n is a three-digit positive integer, what is the tens digit of n? Difficulty: 805+ Level, Divisibility/Multiples/Factors, Remainders, Source: Manhattan GMAT98If z1, z2, z3, ..., zn is a series of zn is a series of n consecutive Difficulty: 805+ Level, Statistics and Sets Problems, Source: Kaplan99The GMAT is scored on a scale of 200 to 800 in 10 point incr Difficulty: 805+ Level, Statistics and Sets Problems, Word Problems, Source: GMAT Prep100Is n/18 an integer? (1) 5n/18 is an integer. (2) 3n/18 is an integer. Difficulty: 805+ Level, Divisibility/Multiples/Factors, Number Properties, Source: Manhattan GMAT

Data Sufficiency (DS)

Rank

Title

Topics

1

If a certain vase contains only roses and tulips, how many tulips are

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019

2

A box contains only white balls and black balls. What is the probabili

Difficulty: Sub 505 Level, Probability, Source: Official Guide, Source: Quant Review 2022, Source: Quant Review 2021

3

What is the value of 10 percent of y?

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016

4

What is the number of pages of a certain journal article? The size of

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019

5

Is the integer k a prime number? (1) 2k = 6 (2) 1 < k < 6

Difficulty: Sub 505 Level, Number Properties, Source: Official Guide, Source: OG 11

6

What was the median annual salary for the employees at Compan

Difficulty: Sub 505 Level, Statistics and Sets Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019

7

What is the tenths digit of the number d when it is written as a decim

Difficulty: Sub 505 Level, Fractions/Ratios/Decimals, Source: Official Guide, Source: EA, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016

8

How many basic units of currency X are equivalent to 250 basi

Difficulty: Sub 505 Level, Arithmetic, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019

9

If r and s are positive integers, is r + s even?

Difficulty: Sub 505 Level, Number Properties, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020

10

What number is 15 percent of x ? (1) 18 is 6 percent of x (2) 2/3 of x

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: Official Guide, Source: OG 11, Source: OG 10

11

The research funds of a certain company were divided among three depar

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019

12

In a recent town election, what was the ratio of the number of votes

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019

13

If sequence S has 120 terms, what is the 105th term of S?

Difficulty: Sub 505 Level, Sequences, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016

14

How many liters of apple juice were added to the cranberry juice in a

Difficulty: Sub 505 Level, Mixture Problems, Source: GMAT Prep (Focus)

15

If Hans purchased a pair of skis and a ski jacket, what was the cost

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 10, Source: 1000 Series

16

In College X the number of students enrolled in both a

Difficulty: Sub 505 Level, Overlapping Sets, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12

17

An attorney charged a fee for estate planning services for a certain

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: GMAT Prep

18

If the list price of a new car was $12,300, what was the cost of the

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: 1000 Series

19

Each of the marbles in a jar is either red or white or blue. If one ma

Difficulty: Sub 505 Level, Probability, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016

20

If sequence S has 200 terms, what is the 192nd term of S

Difficulty: Sub 505 Level, Sequences, Source: GMAT Prep, Source: OG 12

21

If p, q, x, y and z are different positive integers, which of the five

Difficulty: Sub 505 Level, Statistics and Sets Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 2022, Source: Quant Review 2021, Source: Quant Review 2020, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 1st, Source: Quant Review 2nd, Source: Quant Review 2016, Source: 1000 Series

22

Carlotta can drive from her home to her office by one of two

Difficulty: Sub 505 Level, Distance/Rate Problems, Source: Official Guide, Source: OG 12, Source: OG 11, Source: OG 10, Source: 1000 Series

23

For which type of investment, J or K, is the annual rate of return gre

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 2022, Source: OG 2015, Source: OG 12, Source: 1000 Series

24

A company bought 3 printers and 1 scanner. What was the price of the

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019

25

The symbol R represents one of the following

Difficulty: Sub 505 Level, Arithmetic, Functions and Custom Characters, Source: GMAT Hacks

26

Is k positive? (1) k is between -2 and 3 on the number line. (2) k is

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Prep

27

What is the average distance that automobile D travels on one full

Difficulty: Sub 505 Level, Distance/Rate Problems, Source: Official Guide (Pre-2000), Source: OG 1988, Source: 1000 Series

28

There are 2 groups of students who took a history test. Was the averag

Difficulty: Sub 505 Level, Overlapping Sets, Source: Official Guide, Source: OG 2022, Source: OG 2021

29

How many of the students in a certain class are taking both a history

Difficulty: Sub 505 Level, Number Properties, Word Problems, Source: GMAT Prep

30

Committee member W wants to schedule a one-hour meeting on T

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 1st, Source: Quant Review 2nd, Source: Quant Review 2016, Source: 1000 Series

31

Hoses X and Y simultaneously fill an empty swimming pool

Difficulty: Sub 505 Level, Work/Rate Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 1st, Source: Quant Review 2nd, Source: 1000 Series

32

Question If a certain machine produces bolts at a constant rate, how

Difficulty: Sub 505 Level, Work/Rate Problems, Source: GMAT Prep (Focus)

33

What is 11% of x? (1) 3/8 of x is 24 (2) 5% of x is 3.2

Difficulty: Sub 505 Level, Arithmetic, Percent and Interest Problems, Source: Manhattan GMAT

34

What is the value of n?

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Prep

35

A thoroughly blended biscuit mix includes only flour and bak

Difficulty: Sub 505 Level, Mixture Problems, Source: OG 11, Source: OG 10, Source: 1000 Series

36

If r and s are positive integers, r is what percent of s?

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: Official Guide, Source: OG 11, Source: OG 10, Source: Quant Review 1st, Source: 1000 Series

37

Is r to the right of -6 on the number line?

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Prep

38

Is the integer p even? (1) The integer p^2 + 1 is odd. (2) The integer

Difficulty: Sub 505 Level, Number Properties, Source: Official Guide, Source: Quant Review 2022, Source: Quant Review 2021, Source: Quant Review 2020, Source: Quant Review 2019

39

For a certain bottle and cork, what is the price of the cork?

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide (Pre-2000), Source: OG 1988, Source: 1000 Series

40

What is the value of the integer x? (1) x is a prime number (2) 31 ≤ x

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 11, Source: OG 10, Source: Quant Review 2022, Source: Quant Review 2021

41

What is the greatest integer that is less than t?

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Prep

42

The regular price per eight-ounce can of brand X soup is $0.37, regard

Difficulty: Sub 505 Level, Word Problems, Source: GMAT Paper Tests, Source: OG 10, Source: 1000 Series

43

If n is an integer, is n + 1 odd?

Difficulty: Sub 505 Level, Number Properties, Source: Official Guide, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11

44

What is the capacity, in liters, of a certain aquarium?

Difficulty: Sub 505 Level, Word Problems, Source: GMAT Paper Tests, Source: 1000 Series

45

Is n an integer greater than 14?

Difficulty: Sub 505 Level, Number Properties, Source: Official Guide (Pre-2000), Source: OG 1988

46

The regular price for canned soup was reduced during a sale. How much

Difficulty: Sub 505 Level, Word Problems, Source: OG 10, Source: 1000 Series

47

Does Joe weigh more than Tim? (1) Tim’s weight is 80 percent of Joe’s

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: 1000 Series

48

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

Difficulty: Sub 505 Level, Arithmetic, Source: Manhattan GMAT

49

Is p^2 an odd integer? (1) p is an odd integer. (2) is an odd integer.

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 1st, Source: Quant Review 2nd, Source: Quant Review 2016

50

A certain bag contains red, blue, and green marbles. What is the ratio

Difficulty: Sub 505 Level, Fractions/Ratios/Decimals, Source: GMAT Prep

51

In a certain class, some students donated cans of food to a local food

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019

52

What was the range of the selling prices of the 30 wallets sold by a

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016

53

On a map, 1/2 inch represents 100 miles. According to this map, how ma

Difficulty: Sub 505 Level, Arithmetic, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020

54

How many people in a group of 50 own neither a fax machine nor a laser

Difficulty: Sub 505 Level, Overlapping Sets, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016

55

If a certain city is losing 12 percent of its daily water supply each

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 10, Source: 1000 Series

56

What is the value of n in the list above?

Difficulty: Sub 505 Level, Statistics and Sets Problems, Source: Official Guide, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015

57

How many men are in a certain company's vanpool program?

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019

58

Is x to the right of -5 on the number line?

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Prep

59

By what percent was the price of a certain candy bar increased?

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: Official Guide, Source: OG 10, Source: 1000 Series

60

Is x greater than 75 percent of y ?

Difficulty: Sub 505 Level, Arithmetic, Percent and Interest Problems, Source: GMAT Paper Tests, Source: 1000 Series

61

What is the tenths digit of the decimal d ?

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Paper Tests, Source: 1000 Series

62

Last Friday each of the pets at a certain veterinary clinic was given

Difficulty: Sub 505 Level, Word Problems, Source: GMAT Prep

63

If r and s are integers, is r divisible by 7?

Difficulty: Sub 505 Level, Divisibility/Multiples/Factors, Number Properties, Source: OG 10, Source: 1000 Series

64

If p and q are positive numbers, what percent of p is q?

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: GMAT Prep

65

If n is an integer, is n - 1 even?

Difficulty: Sub 505 Level, Number Properties, Source: Grockit

66

If integer p is greater than 1, is p a prime number?

Difficulty: Sub 505 Level, Divisibility/Multiples/Factors, Number Properties, Source: GMAT Prep

67

If n is a positive integer, are n and 1 the only positive divisors of

Difficulty: Sub 505 Level, Number Properties, Source: Official Guide (Pre-2000), Source: OG 1988

68

Is the average (arithmetic mean) of the seven numbers negative?

Difficulty: Sub 505 Level, Statistics and Sets Problems, Source: GMAT Paper Tests, Source: GMAT Prep

69

A certain ski shop sold 125 pairs of skis and 100 pairs of ski boots

Difficulty: Sub 505 Level, Statistics and Sets Problems, Word Problems, Source: Official Guide, Source: Quant Review 2022, Source: Quant Review 2021

70

How many books does Ricardo have? (1) If Ricardo had 15 fewer books,

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 10

71

The retail price of a certain refrigerator is 1.6 times its wholesale

Difficulty: Sub 505 Level, Word Problems, Source: GMAT Prep

72

If today the price of an item is $3,600, what was the price of the ite

Difficulty: Sub 505 Level, Word Problems, Source: 1000 Series

73

If n and k are greater than zero, is n/k an integer ?

Difficulty: Sub 505 Level, Number Properties, Source: OG 11, Source: 1000 Series

74

If a school district paid a total of $35 per desk for x desks and a to

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020

75

If n is a positive integer, is n odd?

Difficulty: Sub 505 Level, Number Properties, Source: Official Guide, Source: EA, Source: OG 10, Source: 1000 Series

76

If n is a member of the set {33, 36, 38, 39, 41, 42}, what is the va

Difficulty: Sub 505 Level, Statistics and Sets Problems, Source: GMAT Paper Tests, Source: Power Prep, Source: EA, Source: OG 10, Source: Quant Review 1st, Source: 1000 Series

77

If on a fishing trip Jim and Tom each caught some fish, which one

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 10, Source: 1000 Series

78

Who types at a faster rate, John or Bob?

Difficulty: Sub 505 Level, Work/Rate Problems, Source: Official Guide (Pre-2000), Source: OG 1988, Source: 1000 Series

79

The number of seats in the first row of an auditorium is 18

Difficulty: Sub 505 Level, Sequences, Source: Official Guide, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: 1000 Series

80

How much did the taxi driver charge George for the trip to the airport

Difficulty: Sub 505 Level, Word Problems, Source: GMAT Prep

81

Machine R and machine S work at their respective constant rates. How

Difficulty: Sub 505 Level, Work/Rate Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019

82

How many numbers do the sets S and T have in common?

Difficulty: Sub 505 Level, Statistics and Sets Problems, Source: GMAT Paper Tests, Source: 1000 Series

83

If S = {2, 3, x, y}, what is the value of x + y?

Difficulty: Sub 505 Level, Number Properties, Source: Official Guide (Pre-2000), Source: OG 1988, Source: 1000 Series

84

Was the amount of John's heating bill for February greater than it was

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019

85

Is n equal to zero? (1) The product of n and some nonzero number is 0

Difficulty: Sub 505 Level, Number Properties, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020

86

If J, K, L, M, and N and positive integers in ascending order, what is

Difficulty: Sub 505 Level, Number Properties, Source: Official Guide (Pre-2000), Source: OG 1988, Source: 1000 Series

87

If the average (arithmetic mean) cost per sweater for 3 pullover sweat

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: Quant Review 2022, Source: Quant Review 2021

88

If y > 0, then x is what percent of y?

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: GMAT Paper Tests, Source: Official Guide

89

If n is an integer, is (100-n)/n an integer?

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Paper Tests, Source: OG 10, Source: Quant Review 1st

90

If knz≠0, what is the ratio of k to n? 1) The ratio of k to z is 2 to

Difficulty: Sub 505 Level, Fractions/Ratios/Decimals, Source: Math Revolution

91

Each of the 105 students in a certain club is either a freshman, sopho

Difficulty: Sub 505 Level, Fractions/Ratios/Decimals, Source: GMAT Prep

92

Is w + h^4 positive? (1) h is positive (2) w is positive

Difficulty: Sub 505 Level, Number Properties, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017

93

How many people received a certain survey?

Difficulty: Sub 505 Level, Fractions/Ratios/Decimals, Word Problems, Source: GMAT Prep

94

How many newspapers were sold at a certain newsstand today?

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 1st, Source: Quant Review 2nd, Source: Quant Review 2016, Source: 1000 Series

95

At a certain restaurant, if each hamburger costs the same am

Difficulty: Sub 505 Level, Word Problems, Source: GMAT Prep

96

For all x, the expression x* is defined to be ax + a, where a is......

Difficulty: Sub 505 Level, Functions and Custom Characters, Source: Official Guide, Source: Quant Review 2022, Source: Quant Review 2021, Source: Quant Review 2020, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016

97

Last year an employee received a gross annual salary of $18,000, which

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide (Pre-2000), Source: OG 1988, Source: 1000 Series

98

What were the gross revenues from ticket sales for a certain

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 1st, Source: Quant Review 2nd, Source: Quant Review 2016

99

What is 5 percent of x ? (1) x = 200 (2) 10 percent of x is 20.

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: GMAT Paper Tests, Source: 1000 Series

100

Is the average (arithmetic mean) of x and y greater than 20?

Difficulty: Sub 505 Level, Number Properties, Source: OG 10, Source: 1000 Series

GMAT Data Sufficiency (DS) Questions

100 Hardest and easiest questions for DS as of March 2024