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100 Hardest Data Sufficiency Questions (May 1st, 2021  Jun 1st, 2021)
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.100 Easiest Data Sufficiency Questions (May 1st, 2021  Jun 1st, 2021)
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 easiest 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  What is the number of pages of a certain journal article? The size of  Difficulty: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2020, Source: OG 2019 
2  What is the value of 10 percent of y?  Difficulty: Sub600 Level, Percent and Interest Problems, Source: Official Guide, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 
3  What is the value of x ?  Difficulty: Sub600 Level, Algebra, Source: Official Guide, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016 
4  If a certain vase contains only roses and tulips, how many tulips are  Difficulty: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2020, Source: OG 2019 
5  What is the perimeter of triangle ABC ? (1) AB = 16 inches (2) ABC is  Difficulty: Sub600 Level, Geometry, Source: Official Guide, Source: Quant Review 2020 
6  What is the value of x ?  Difficulty: Sub600 Level, Algebra, Source: Official Guide, Source: Quant Review 2nd 
7  How many basic units of currency X are equivalent to 250 basi  Difficulty: Sub600 Level, Arithmetic, Source: Official Guide, Source: OG 2020, Source: OG 2019 
8  If r and s are positive integers, is r + s even?  Difficulty: Sub600 Level, Number Properties, Source: Official Guide, Source: OG 2020 
9  What was the median annual salary for the employees at Compan  Difficulty: Sub600 Level, Statistics and Sets Problems, Source: Official Guide, Source: OG 2020, Source: OG 2019 
10  In a recent town election, what was the ratio of the number of votes  Difficulty: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2020, Source: OG 2019 
11  In College X the number of students enrolled in both a  Difficulty: Sub600 Level, Overlapping Sets, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12 
12  The research funds of a certain company were divided among three depar  Difficulty: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2020, Source: OG 2019 
13  For which type of investment, J or K, is the annual rate of return gre  Difficulty: Sub600 Level, Percent and Interest Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 2022, Source: OG 2015, Source: OG 12 
14  What is the value of z in the figure above?  Difficulty: Sub600 Level, Geometry, Source: Official Guide, Source: OG 2021 
15  If x and y are positive what is the value of x?  Difficulty: Sub600 Level, Algebra, Source: OG 10, Source: Quant Review 1st 
16  What is the tenths digit of the number d when it is written as a decim  Difficulty: Sub600 Level, Fractions/Ratios/Decimals, Source: Official Guide, Source: EA, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016 
17  If sequence S has 120 terms, what is the 105th term of S?  Difficulty: Sub600 Level, Sequences, Source: Official Guide, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 
18  What is the value of x? (1) x + 1 = 2  3x (2) 1/(2x) = 2  Difficulty: Sub600 Level, Algebra, Source: Official Guide, Source: OG 10, Source: Quant Review 1st 
19  What is the value of n?  Difficulty: Sub600 Level, Number Properties, Source: GMAT Prep 
20  If p and q are positive, is p/q less than 1?  Difficulty: Sub600 Level, Inequalities, Source: Official Guide, Source: Quant Review 2020, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016 
21  If sequence S has 100 terms, what is the 83rd term of S?  Difficulty: Sub600 Level, Sequences, Source: Other  Please specify 
22  The symbol R represents one of the following  Difficulty: Sub600 Level, Arithmetic, Functions and Custom Characters, Source: GMAT Hacks 
23  Each of the marbles in a jar is either red or white or blue. If one ma  Difficulty: Sub600 Level, Probability, Source: Official Guide, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 
24  If p, q, x, y, and z are different positive integers, which  Difficulty: Sub600 Level, Statistics and Sets Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, 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 
25  What number is 15 percent of x ? (1) 18 is 6 percent of x (2) 2/3 of x  Difficulty: Sub600 Level, Percent and Interest Problems, Source: Official Guide, Source: OG 11, Source: OG 10 
26  Is x = 1/y? (1) xy = 1 (2) 1/(xy) = 1  Difficulty: Sub600 Level, Algebra, Source: Official Guide, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 
27  Is 2x > 2y ? (1) x > y (2) 3x > 3y  Difficulty: Sub600 Level, Inequalities, Source: Official Guide, Source: Quant Review 2020, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016 
28  What is the value of w^(−2)?  Difficulty: Sub600 Level, Exponents/Powers, Source: Official Guide, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 
29  What is the value of xy?  Difficulty: Sub600 Level, Algebra, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, 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 
30  A company bought 3 printers and 1 scanner. What was the price of the  Difficulty: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2020, Source: OG 2019 
31  Is the integer k a prime number? (1) 2k = 6 (2) 1 < k < 6  Difficulty: Sub600 Level, Number Properties, Source: Official Guide, Source: OG 11 
32  P is a particle on the circle shown above. What is the length of the p  Difficulty: Sub600 Level, Geometry, Source: Official Guide, Source: Quant Review 2020 
33  What is 11% of x? (1) 3/8 of x is 24 (2) 5% of x is 3.2  Difficulty: Sub600 Level, Arithmetic, Percent and Interest Problems, Source: Manhattan GMAT 
34  What is the average distance that automobile D travels on one full tan  Difficulty: Sub600 Level, Algebra, Word Problems, Source: Official Guide [Pre2000], Source: OG 1988 
35  Carlotta can drive from her home to her office by one of two  Difficulty: Sub600 Level, Distance/Rate Problems, Source: Official Guide, Source: OG 12, Source: OG 11, Source: OG 10 
36  If sequence S has 200 terms, what is the 192nd term of S  Difficulty: Sub600 Level, Sequences, Source: GMAT Prep, Source: OG 12 
37  A box contains only white balls and black balls. What is the probabili  Difficulty: Sub600 Level, Probability, Source: Official Guide, Source: Quant Review 2021 
38  The figure above represents a circle graph of Company H's total expens  Difficulty: Sub600 Level, Geometry, Graphs and Illustrations, Source: Official Guide, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11 
39  Committee member W wants to schedule a onehour meeting on T  Difficulty: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 1st, Source: Quant Review 2nd, Source: Quant Review 2016 
40  How many of the students in a certain class are taking both a history  Difficulty: Sub600 Level, Number Properties, Word Problems, Source: GMAT Prep 
41  Is x an integer? (1) x^3 = 8 (2) x = 4^(1/2)  Difficulty: Sub600 Level, Algebra, Number Properties, Source: Official Guide, Source: OG 2020 
42  What is the value of x−1?  Difficulty: Sub600 Level, Algebra, Source: Official Guide [Pre2000], Source: OG 1988, Source: Other  Please specify 
43  In the xyplane above, is angle QPR a right angle?  Difficulty: Sub600 Level, Coordinate Geometry, Geometry, Source: Official Guide, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015 
44  What is the volume of the right circular cylinder X ?  Difficulty: Sub600 Level, Geometry, Source: Official Guide, Source: OG 2021 
45  P is a particle on the circle shown above. What is the length of the p  Difficulty: Sub600 Level, Geometry, Source: Official Guide [Pre2000] 
46  If the list price of a new car was $12,300, what was the cost of the  Difficulty: Sub600 Level, Percent and Interest Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10 
47  How many liters of apple juice were added to the cranberry juice in a  Difficulty: Sub600 Level, Mixture Problems, Source: Manhattan GMAT 
48  Is p^2 an odd integer?  Difficulty: Sub600 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 
49  Is k positive? (1) k is between 2 and 3 on the number line. (2) k is  Difficulty: Sub600 Level, Number Properties, Source: GMAT Prep 
50  Is x < y?  Difficulty: Sub600 Level, Inequalities, Source: Official Guide, Source: Quant Review 2nd 
51  Hoses X and Y simultaneously fill an empty swimming pool tha  Difficulty: Sub600 Level, Work/Rate Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 1st, Source: Quant Review 2nd 
52  There are 2 groups of students who took a history test. Was the averag  Difficulty: Sub600 Level, Overlapping Sets, Source: Official Guide, Source: OG 2021 
53  Is rw = 0?  Difficulty: Sub600 Level, Inequalities, Source: Official Guide, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 
54  Is x < y? (1) z < y (2) z < x  Difficulty: Sub600 Level, Inequalities, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 1st, Source: Quant Review 2016 
55  Does 2x + 8 = 12 ? (1) 2x + 10 = 14 (2) 3x + 8 = 14  Difficulty: Sub600 Level, Algebra, Source: Official Guide, Source: Quant Review 2020, Source: Quant Review 2019 
56  If n is a positive integer, are n and 1 the only positive divisors of  Difficulty: Sub600 Level, Number Properties, Source: Official Guide [Pre2000], Source: OG 1988 
57  What is the retail price of a certain calculator? (1) The retail pri  Difficulty: Sub600 Level, Arithmetic, Source: Manhattan GMAT 
58  Is n an integer greater than 14?  Difficulty: Sub600 Level, Number Properties, Source: Official Guide [Pre2000], Source: OG 1988 
59  What is the greatest integer that is less than t?  Difficulty: Sub600 Level, Number Properties, Source: GMAT Prep 
60  If x^(1/2)/y = n, what is the value of x?  Difficulty: Sub600 Level, Algebra, Source: Official Guide, Source: OG 11, Source: OG 10 
61  What is the value of x? (1) 5x  3 = 7 (2) x/10 = 1/5  Difficulty: Sub600 Level, Algebra, Source: Official Guide [Pre2000], Source: OG 1988 
62  Is x between 0 and 1? (1) x is between 1/2 and 3/2 (2) 3/4 is 1/4  Difficulty: Sub600 Level, Inequalities, Source: GMAT Prep, Source: Quant Review 2020, Source: Quant Review 2019 
63  Point (x, y) has in which quadrant of the rectangular coordinate syste  Difficulty: Sub600 Level, Coordinate Geometry, Source: GMAT Paper Tests, Source: Magoosh, Source: OG 10, Source: Quant Review 1st 
64  How many people in a group of 50 own neither a fax machine nor a laser  Difficulty: Sub600 Level, Overlapping Sets, Source: Official Guide, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 
65  A certain bag contains red, blue, and green marbles. What is the ratio  Difficulty: Sub600 Level, Fractions/Ratios/Decimals, Source: GMAT Prep 
66  A thoroughly blended biscuit mix includes only flour and bak  Difficulty: Sub600 Level, Mixture Problems, Source: OG 11, Source: OG 10 
67  If the Longfellow Playground is rectangular, what is its width?  Difficulty: Sub600 Level, Geometry, Source: Official Guide [Pre2000], Source: OG 1988 
68  What is the value of r/2 + s/2 ?  Difficulty: Sub600 Level, Algebra, Arithmetic, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 1st, Source: Quant Review 2nd, Source: Quant Review 2016 
69  If n is an integer, is n + 1 odd?  Difficulty: Sub600 Level, Number Properties, Source: Official Guide, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11 
70  How many student s are enrolled in the Groveville Public Schools?  Difficulty: Sub600 Level, Algebra, Source: Official Guide [Pre2000], Source: OG 1988 
71  If R, S, and T are points on a line, and if R is 5 meters from T and 2  Difficulty: Sub600 Level, Geometry, Source: Official Guide, Source: OG 2020 
72  If x is positive, what is the value of y ?  Difficulty: Sub600 Level, Algebra, Source: GMAT Prep 
73  Is the product ny greater than 0 ? (1) n is between –1 and 1. (2) y  Difficulty: Sub600 Level, Inequalities, Source: GMAT Prep 
74  How much is 20 percent of a certain number a ?  Difficulty: Sub600 Level, Algebra, Source: OG 11, Source: Other  Please specify 
75  How many men are in a certain company's vanpool program?  Difficulty: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2020, Source: OG 2019 
76  For the system of equations given, what is the value of z?  Difficulty: Sub600 Level, Algebra, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11 
77  In a certain class, some students donated cans of food to a local food  Difficulty: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2020, Source: OG 2019 
78  What is the value of n in the list above?  Difficulty: Sub600 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 
79  In the figure above, if lines k and m are parallel, what is the value  Difficulty: Sub600 Level, Geometry, Source: Official Guide, Source: OG 11, Source: OG 10 
80  If integer p is greater than 1, is p a prime number?  Difficulty: Sub600 Level, Divisibility/Multiples/Factors, Number Properties, Source: GMAT Prep 
81  Is x greater than 1.8? (1) x > 1.7 (2) x > 1.9  Difficulty: Sub600 Level, Inequalities, Source: Official Guide, Source: OG 11, Source: OG 10 
82  What is the product of v, w, and x?  Difficulty: Sub600 Level, Number Properties 
83  If r > 0, is rs < 0 ? (1) s < 0 (2) s < r  Difficulty: Sub600 Level, Inequalities, Source: GMAT Prep 
84  What is the value of w + q ? (1) 3w=33q (2) 5w +5q = 5  Difficulty: Sub600 Level, Algebra, Source: Official Guide, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015 
85  On a map, 1/2 inch represents 100 miles. According to this map, how ma  Difficulty: Sub600 Level, Arithmetic, Source: Official Guide, Source: OG 2020 
86  Is m > k? (1) 3m > 3k (2) 2m > 2k  Difficulty: Sub600 Level, Inequalities, Source: GMAT Prep 
87  Machine R and machine S work at their respective constant rates. How  Difficulty: Sub600 Level, Work/Rate Problems, Source: Official Guide, Source: OG 2020, Source: OG 2019 
88  In ΔJKL shown above, what is the length of segment JL ?  Difficulty: Sub600 Level, Geometry, Source: Official Guide, Source: OG 2020 
89  What was the range of the selling prices of the 30 wallets sold by a  Difficulty: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2020, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 
90  Is the triangle above equilateral?  Difficulty: Sub600 Level, Geometry, Source: GMAT Paper Tests, Source: OG 11, Source: OG 10 
91  Is the integer p even? (1) The integer p^2 + 1 is odd. (2) The integer  Difficulty: Sub600 Level, Number Properties, Source: Official Guide, Source: Quant Review 2020, Source: Quant Review 2019 
92  If knz≠0, what is the ratio of k to n? 1) The ratio of k to z is 2 to  Difficulty: Sub600 Level, Fractions/Ratios/Decimals, Source: Math Revolution 
93  What is the value of x^3?  Difficulty: Sub600 Level, Absolute Values/Modulus, Algebra, Source: Veritas Prep 
94  If r and s are positive integers, r is what percent of s?  Difficulty: Sub600 Level, Percent and Interest Problems, Source: Official Guide, Source: OG 11, Source: OG 10, Source: Quant Review 1st 
95  The number of seats in the first row of an auditorium is 18  Difficulty: Sub600 Level, Sequences, Source: Official Guide, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015 
96  What is the value of the integer N?  Difficulty: Sub600 Level, Inequalities, Source: Official Guide, Source: Quant Review 2020, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016 
97  A garden store purchased a number of shovels and a number of rakes. If  Difficulty: Sub600 Level, Word Problems, Source: GMAT Prep 
98  What is the value of x ? (1) y  x = y  6 (2) x + 2y = 10  Difficulty: Sub600 Level, Algebra, Source: GMAT Prep 
99  If p and q are positive numbers, what percent of p is q?  Difficulty: Sub600 Level, Percent and Interest Problems, Source: GMAT Prep 
100  A circular pizza is cut into eight wedgeshaped slices of equal size.  Difficulty: Sub600 Level, Geometry, Source: Manhattan GMAT 
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