100 Hardest and easiest questions for DS as of June 2025 : Data Sufficiency (DS)

Bunuel · 2015-08-21T03:42:39-07:00

100 Hardest Data Sufficiency Questions (Jun 1st, 2025 - Jul 1st, 2025) 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) Rank Title Topics 1 In the correctly worked addition problem above, A, B, C, D Difficulty: 805+ Level, Arithmetic, Number Properties, Source: Manhattan GMAT 2 A car dealership carries only sedans and SUVs Difficulty: 805+ Level, Percent and Interest Problems, Word Problems, Source: Veritas Prep 3 If all the N students of a class are classified into groups of either Difficulty: 805+ Level, Multiples and Factors, Number Properties, Source: e-GMAT 4 n and k are positive integers. When n is divided by 23, the quotient i Difficulty: 805+ Level, Remainders, Source: GMAT Prep Now 5 P and Q are prime numbers less than 70. What is the units digit of P*Q Difficulty: 805+ Level, Number Properties, Source: e-GMAT 6 A three digit number A with hundreds digit a, tens digit b and units Difficulty: 805+ Level, Multiples and Factors, Number Properties, Source: Jamboree 7 At a certain animal shelter, there are nine dogs available for Difficulty: 805+ Level, Probability, Source: GMAT Ninja 8 Superfast train A leaves Newcastle for Birmingham at 3 PM and travels Difficulty: 805+ Level, Distance and Speed Problems, Source: Veritas Prep 9 There is a sequence, 4(10^n), 4(10^(n-1)), ..., 4(10^(n-m)), for posit Difficulty: 805+ Level, Number Properties, Sequences, Source: Math Revolution 10 The average (arithmetic mean) of 5 distinct, single digit integers is Difficulty: 805+ Level, Number Properties, Source: Princeton Review 11 If a and b are two-digit positive integers greater than 10 Difficulty: 805+ Level, Remainders, Source: GMAT Club Tests 12 b, c, d, e, f and g are different positive integers. When b is divided Difficulty: 805+ Level, Remainders, Source: GMAT Prep Now 13 12 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 Tests 14 X is a three-digit positive integer in which each digit is either 1 or Difficulty: 805+ Level, Fractions and Ratios, Remainders, Source: Manhattan GMAT 15 GMAT Club Olympics 2024 (Day 1): In a company, the average (arithmetic Difficulty: 805+ Level, Statistics and Sets Problems, Source: Competition Questions, Source: GMAT Club Tests 16 Mrs. Claus is selecting three reindeer from the herd for a special Difficulty: 805+ Level, Probability, Source: GMAT Club Tests 17 Bob and Wendy left home to walk together to a restaurant for Difficulty: 805+ Level, Distance and Speed Problems, Source: Manhattan GMAT 18 Abe, Beth, Carl and Duncan are four siblings, among which Abe and Carl Difficulty: 805+ Level, Number Properties, Source: e-GMAT 19 W, X, Y, and Z represent distinct digits such that WX * YZ = 1995. Wha Difficulty: 805+ Level, Number Properties, Source: Veritas Prep 20 If a, b, and c are integers such that 0 Difficulty: 805+ Level, Multiples and Factors, Source: Manhattan GMAT 21 The average (arithmetic mean) of the original six prices for six coats Difficulty: 805+ Level, Word Problems, Source: Manhattan GMAT 22 A newer machine, working alone at its constant rate Difficulty: 805+ Level, Work and Rate Problems, Source: Veritas Prep 23 For positive integers n and m (n>m), is the average (arithmetic mean) Difficulty: 805+ Level, Number Properties, Statistics and Sets Problems, Source: Math Revolution 24 In the number 13,52#,@ and # represent distinct digits. Difficulty: 805+ Level, Arithmetic, Multiples and Factors, Source: Princeton Review 25 A car manufacturer organized a test drive of two of its prototypes. Difficulty: 805+ Level, Statistics and Sets Problems, Source: CrackVerbal 26 There are three different ways to score in basketball. A successful Difficulty: 805+ Level, Word Problems, Source: Kaplan 27 Julian bought 6 kilograms of cheese from each of Deli A and Deli B. At Difficulty: 805+ Level, Word Problems, Source: 800 Score 28 If x, y and z are positive integers such that x^4*y^3 = z^2 Difficulty: 805+ Level, Number Properties, Source: e-GMAT 29 Positive 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 Tests 30 A certain fruit stand sells only apples for $0.26 each, bananas for $0 Difficulty: 805+ Level, Word Problems, Source: Veritas Prep 31 x, y are positive integers. Find the number of even factors of 4x^2 Difficulty: 805+ Level, Multiples and Factors, Number Properties, Source: e-GMAT 32 Six numbers are randomly selected and placed within a set. If the set Difficulty: 805+ Level, Statistics and Sets Problems, Source: Princeton Review 33 Between 1980 and 1985, Pierre’s investment portfolio increas Difficulty: 805+ Level, Percent and Interest Problems, Source: Princeton Review 34 GMAT CLUB OLYMPICS: In a survey of an Olympic team members, 1/6th of Difficulty: 805+ Level, Overlapping Sets, Source: Competition Questions, Source: GMAT Club Tests 35 A certain diet program calls for eating daily calories from Difficulty: 805+ Level, Word Problems, Source: GMAT Paper Tests 36 In the correctly-worked multiplication problem above, each Difficulty: 805+ Level, Number Properties, Source: Veritas Prep 37 In the correctly-worked multiplication problem above, each symbol repr Difficulty: 805+ Level, Arithmetic, Number Properties, Source: Veritas Prep 38 GMAT Club Olympics 2024 (Day 2): Of the 100 flowers in a garden, 3/4 Difficulty: 805+ Level, Word Problems, Source: Competition Questions, Source: GMAT Club Tests 39 A coin purse contains 13 coins, each worth 1, 5, 10, or 25 cents; the Difficulty: 805+ Level, Word Problems, Source: Manhattan GMAT 40 If a and b are positive integers, what is the remainder when ab is Difficulty: 805+ Level, Multiples and Factors, Number Properties, Remainders, Source: Manhattan GMAT 41 Reiko drove from point A to point B at a constant speed, and Difficulty: 805+ Level, Distance and Speed Problems, Source: Manhattan GMAT 42 Lily has only red and blue balls in a jar. If she removes three balls Difficulty: 805+ Level, Probability, Source: Experts' Global 43 Jeff drove two laps around a track. Was his average speed less than 60 Difficulty: 805+ Level, Distance and Speed Problems, Source: Manhattan GMAT 44 If m and n are non-zero integers, is m6-m5-m4 divisible by n? 1) m2 Difficulty: 805+ Level, Multiples and Factors, Number Properties, Source: Math Revolution 45 Allison always leaves her office at 5.00pm and reaches her Difficulty: 805+ Level, Distance and Speed Problems, Source: Veritas Prep 46 If x, y, and z are integers, and x Difficulty: 805+ Level, Statistics and Sets Problems, Source: Manhattan GMAT 47 Is A + B + C even? Difficulty: 805+ Level, Number Properties, Source: GMAT Club Tests 48 1/3 of golfers also play tennis, 3/5 of tennis players also surf. 4/7 Difficulty: 805+ Level, Fractions and Ratios, Overlapping Sets, Probability, Source: Princeton Review 49 Four friends go to Macys for shopping and buy a top each. Three of th Difficulty: 805+ Level, Word Problems, Source: Veritas Prep 50 In a group of 80 college students, how many own a car? Difficulty: 805+ Level, Overlapping Sets, Source: Magoosh 51 If m, n, and p are three-digit integers and m + n = p Difficulty: 805+ Level, Number Properties, Source: Manhattan GMAT 52 A certain salesman's yearly income is determined by a base salary plus Difficulty: 805+ Level, Percent and Interest Problems, Word Problems, Source: Manhattan GMAT 53 The average (arithmetic mean) of the original six prices for six coats Difficulty: 805+ Level, Statistics and Sets Problems, Source: Manhattan GMAT 54 In the morning, Chris drives from Toronto to Oakville and in the eveni Difficulty: 805+ Level, Distance and Speed Problems, Source: Veritas Prep 55 At a particular store, candy bars are normally priced at $1. Difficulty: 805+ Level, Word Problems, Source: Manhattan GMAT 56 A state legislator drafts an income tax proposal that imposes a tax of Difficulty: 805+ Level, Word Problems, Source: Princeton Review 57 w, x, y and z are positive integers such that y Difficulty: 805+ Level, Remainders, Source: GMAT Prep Now 58 w, x, y and z are positive integers. When w is divided by x, the quoti Difficulty: 805+ Level, Multiples and Factors, Remainders, Source: GMAT Prep Now 59 In 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 Prep 60 GMAT Club World Cup 2022 (DAY 10): On a joint company picnic, 160 Difficulty: 805+ Level, Word Problems, Source: Competition Questions, Source: GMAT Club Tests 61 The difference between positive two-digit integer A and the smaller tw Difficulty: 805+ Level, Multiples and Factors, Number Properties, Source: Manhattan GMAT 62 Blair is shopping for a meal. He buys truffles, caviar, tuna, and grap Difficulty: 805+ Level, Word Problems, Source: Princeton Review 63 Three positive integers a, b and c leave the same remainder y Difficulty: 805+ Level, Remainders, Source: e-GMAT 64 GMAT Club World Cup 2022 (DAY 1): Mbappé has two types of sneakers Difficulty: 805+ Level, Word Problems, Source: Competition Questions, Source: GMAT Club Tests 65 The members of a company’s board of directors must select a subcommitt Difficulty: 805+ Level, Combinations, Source: Kaplan 66 If x and y are positive integers, what is the value of x? Difficulty: 805+ Level, Remainders, Source: GMAT Prep Now 67 A bag contains four types of coins: 5-cent coins, 10 cent coins, 50-ce Difficulty: 805+ Level, Word Problems, Source: e-GMAT 68 Set P consists of the first n positive multiples of 3 and set Q consis Difficulty: 805+ Level, Number Properties, Source: e-GMAT 69 In the correctly worked addition problem above, M, N, R, S, T and V Difficulty: 805+ Level, Arithmetic, Source: Veritas Prep 70 Merle's spare change jar has exactly 16 U.S. coins, each of which is a Difficulty: 805+ Level, Word Problems, Source: Official Guide 71 Is x divisible by 39? Difficulty: 805+ Level, Multiples and Factors, Remainders, Source: Kaplan 72 How many prime factors does positive integer n have? Difficulty: 805+ Level, Multiples and Factors, Number Properties, Source: Veritas Prep 73 A quality control worker at a warehouse inspects x separate boxes, eac Difficulty: 805+ Level, Statistics and Sets Problems, Source: Princeton Review 74 Of the 48 students in a class, 16 like to study History. What percenta Difficulty: 805+ Level, Statistics and Sets Problems, Source: e-GMAT 75 W, X, Y and Z are four different positive integers. Difficulty: 805+ Level, Remainders, Source: GMAT Prep Now 76 12 Days of Christmas GMAT Competition - Day 5: On a farm with a total Difficulty: 805+ Level, Word Problems, Source: Competition Questions, Source: GMAT Club Tests 77 If N is a positive three-digit number that is greater than 2 Difficulty: 805+ Level, Fractions and Ratios, Number Properties, Source: Manhattan GMAT 78 A nonprofit group organizes its local fundraisers in teams, Difficulty: 805+ Level, Word Problems, Source: Veritas Prep 79 There are 6 floors in an apartment building. Difficulty: 805+ Level, Word Problems, Source: Magoosh 80 For the sequence of numbers a1, a2, a3, an, , each term after the Difficulty: 805+ Level, Sequences, Source: Princeton Review 81 Students in a class are arranged to form groups of 4 members each Difficulty: 805+ Level, Remainders, Source: Veritas Prep 82 If 10^a * 3^b * 5^c = 450^n, what is the value of c? Difficulty: 805+ Level, Number Properties, Source: Veritas Prep 83 One-sixth of the orders placed at a take-out restaurant on Friday nigh Difficulty: 805+ Level, Word Problems, Source: Magoosh 84 A drawer contains 6 socks. If two socks are randomly Difficulty: 805+ Level, Probability, Source: GMAT Prep Now 85 It has been proposed that teenagers aged 10 to 15 years be restricted Difficulty: 805+ Level, Source: Official Guide, Source: Data Insights Review 2024-2025, Non-Math Related 86 A dental licensure exam requires a 75% minimum score in orde Difficulty: 805+ Level, Fractions and Ratios, Word Problems, Source: Veritas Prep 87 If x is a positive integer greater than 1, and y is the smallest posit Difficulty: 805+ Level, Number Properties, Source: Manhattan GMAT 88 12 Days of Christmas GMAT Competition - Day 2: Jingle, an elf Difficulty: 805+ Level, Statistics and Sets Problems, Source: Competition Questions, Source: GMAT Club Tests 89 GMAT CLUB OLYMPICS: If x > 0, is 1/x a prime number ? Difficulty: 805+ Level, Multiples and Factors, Number Properties, Source: Competition Questions, Source: GMAT Club Tests 90 Rosalie tosses a coin a number of times and counts the total number of Difficulty: 805+ Level, Probability, Source: Princeton Review 91 Julie wants to be sure that she has enough pies for each of her Difficulty: 805+ Level, Word Problems, Source: Manhattan GMAT 92 Marco is making z pizzas and will distribute x slices of pepperoni to Difficulty: 805+ Level, Word Problems, Source: Magoosh 93 For positive integers n and m (n>m), is the average (arithmetic mean) Difficulty: 805+ Level, Number Properties, Source: Math Revolution 94 When a certain drug was administered to a group of patients, some pati Difficulty: 805+ Level, Overlapping Sets, Source: GMAT Prep (Focus only) 95 Each of seven consecutive integers, all greater than positive integer Difficulty: 805+ Level, Multiples and Factors, Number Properties, Statistics and Sets Problems, Source: Manhattan GMAT 96 GMAT CLUB OLYMPICS: If x is a positive integer greater than 3 and x^4 Difficulty: 805+ Level, Multiples and Factors, Remainders, Source: Competition Questions, Source: GMAT Club Tests 97 Events A and B are independent and have equal probabilities Difficulty: 805+ Level, Probability, Source: Veritas Prep 98 If x is a positive integer greater than 1, is x a prime numb Difficulty: 805+ Level, Multiples and Factors, Number Properties, Source: GMAT Club Tests 99 During a certain game, after each turn, a player’s points are doubled Difficulty: 805+ Level, Word Problems, Source: Veritas Prep 100 p, q and r are positive integers such that p Difficulty: 805+ Level, Fractions and Ratios, Multiples and Factors, Number Properties, Source: GMATWhiz

Data Sufficiency (DS)

Rank

Title

Topics

1

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

2

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, Source: OG 2025-2026

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

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

5

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

Difficulty: Sub 505 Level, Probability, Source: Official Guide, Source: Data Insights Review 2024-2025, Source: Quant Review 2022, Source: Quant Review 2021

6

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

7

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

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

8

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

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

9

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, Source: OG 2025-2026

10

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

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: GMAT Prep (Classic only)

11

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

12

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

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

13

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, Source: OG 2025-2026

14

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

15

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, Source: OG 2025-2026

16

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, Source: OG 2025-2026

17

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

Difficulty: Sub 505 Level, Sequences, Source: GMAT Prep (Classic only), Source: OG 12

18

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

19

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 (Classic only)

20

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

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

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: 1000 Series, 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

22

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

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

23

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

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

24

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: 1000 Series, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10

25

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, Source: OG 2025-2026

26

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

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

27

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

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

28

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, Source: OG 2025-2026

29

The symbol R represents one of the following

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

30

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

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

31

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

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

32

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

33

Hoses X and Y simultaneously fill an empty swimming pool

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

34

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 (Classic only)

35

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, Source: OG 2025-2026

36

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

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

37

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

38

What is the value of n?

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Prep (Classic only)

39

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

Difficulty: Sub 505 Level, Fractions and Ratios, Source: GMAT Prep (Classic only)

40

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

41

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

Difficulty: Sub 505 Level, Word Problems, Source: GMAT Prep (Classic only)

42

A thoroughly blended biscuit mix includes only flour and bak

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

43

Is x greater than 75 percent of y ?

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

44

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

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

45

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: 1000 Series, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10

46

What is the greatest integer that is less than t?

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Prep (Classic only)

47

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

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

48

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

49

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

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Prep (Classic only)

50

Is n an integer greater than 14?

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

51

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

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

52

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

53

What is the tenths digit of the decimal d ?

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

54

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, Source: OG 2025-2026

55

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, Source: OG 2025-2026

56

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

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

57

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

58

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, Source: OG 2025-2026

59

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

60

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

Difficulty: Sub 505 Level, Number Properties, Source: GMAT Prep (Classic only)

61

A customer purchased 6 shirts priced at $10.99 each, excluding sales

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: GMAT Prep (Classic only), Source: Official Guide, Source: Data Insights Review 2024-2025

62

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: 1000 Series, Source: GMAT Paper Tests

63

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

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

64

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

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

65

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, Source: OG 2025-2026

66

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

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

67

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

Difficulty: Sub 505 Level, Word Problems, Source: GMAT Prep (Classic only)

68

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

69

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

70

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

Difficulty: Sub 505 Level, Word Problems, Source: GMAT Prep (Classic only)

71

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

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

72

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: 1000 Series, Source: GMAT Paper Tests, Source: Power Prep, Source: EA, Source: OG 10, Source: Quant Review 1st

73

In Country S, if 60 percent of the women aged 18 and over are in

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

74

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

Difficulty: Sub 505 Level, Percent and Interest Problems, Source: GMAT Prep (Classic only)

75

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

Difficulty: Sub 505 Level, Multiples and Factors, Number Properties, Source: GMAT Prep (Classic only)

76

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

Difficulty: Sub 505 Level, Sequences, Source: 1000 Series, Source: Official Guide, Source: OG 2024-2025, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: Data Insights Review 2024-2025

77

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

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

78

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

Difficulty: Sub 505 Level, Word Problems, Source: GMAT Prep (Classic only)

79

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 and Ratios, Source: Math Revolution

80

If n is a positive integer, is n odd?

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

81

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

Difficulty: Sub 505 Level, Word Problems, Source: Official Guide, Source: Data Insights Review 2024-2025, Source: Quant Review 2022, Source: Quant Review 2021

82

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

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

83

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

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

84

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 (Classic only)

85

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

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

86

Who types at a faster rate, John or Bob?

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

87

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

88

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

Difficulty: Sub 505 Level, Work and Rate Problems, Source: Official Guide, Source: OG 2022, Source: OG 2021, Source: OG 2020, Source: OG 2019, Source: OG 2025-2026

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

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

Difficulty: Sub 505 Level, Fractions and Ratios, Source: GMAT Prep (Classic only)

91

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: Data Insights Review 2024-2025, Source: Quant Review 2022, Source: Quant Review 2021

92

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

93

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, Source: OG 2025-2026

94

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

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

95

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, Source: OG 2025-2026

96

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

97

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

98

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

99

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

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

100

Is the positive integer p a prime number?

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