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100 Hardest and easiest questions for DS as of January 2019

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100 Hardest and easiest questions for DS  [#permalink]

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New post Updated on: 01 Feb 2019, 04:45
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309

100 Hardest Data Sufficiency Questions (Jan 1st, 2019 - Feb 1st, 2019)

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)
RankTitleTopics
1Train A leaves New York for Boston at 3 PM and travels at Difficulty: 700-Level, Distance/Rate Problems
2w, x, y, and z are integers. If w > x > y > z > 0, is y a common Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Source: Manhattan GMAT
3What is the perimeter of PQRS ? (1) x = 30 degree Difficulty: 700-Level, Geometry
4A car dealership carries only sedans and SUVs Difficulty: 700-Level, Percent and Interest Problems, Word Problems, Source: Veritas Prep
5In the correctly worked addition problem above, A, B, C, D Difficulty: 700-Level, Arithmetic, Number Properties, Source: Manhattan GMAT
6n and k are positive integers. When n is divided by 23, the quotient i Difficulty: 700-Level, Remainders, Source: GMATPrepNow
7If n is a prime number greater than 2, is 1/x > 1? Difficulty: 700-Level, Exponents/Powers, Inequalities, Source: Manhattan GMAT
8If k is an integer and x(x – k) = k + 1, what is the value of x? Difficulty: 700-Level, Algebra, Source: Other - Please specify
9If, in the addition problem above, a, b, c, d, e, f, x, y, a Difficulty: 700-Level, Arithmetic
10Math Revolution and GMAT Club Contest! There is a sequence, 4(10^n), Difficulty: 700-Level, Number Properties, Sequences, Source: Manhattan GMAT, Source: Math Revolution
11When 120 is divided by positive single-digit integer m the remainder Difficulty: 700-Level, Absolute Values/Modulus, Divisibility/Multiples/Factors, Source: Other - Please specify
12For integers a and b, if (a^3 a^2 b)^1/2 = 7, what is the Difficulty: 700-Level, Algebra
13The average (arithmetic mean) of 5 distinct, single digit integers is Difficulty: 700-Level, Number Properties, Source: Princeton Review
14Right triangle ABO is drawn in the xy-plane, with OB as hypo Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
15The cost of 3 chocolates, 5 biscuits, and 5 ice creams is Difficulty: 700-Level, Word Problems
16Abe, Beth, Carl and Duncan are four siblings, among which Abe and Carl Difficulty: 700-Level, Number Properties, Source: e-GMAT
17If h and k are both positive integers, are both roots of the equation Difficulty: 700-Level, Algebra
18P and Q are prime numbers less than 70. What is the units digit of P*Q Difficulty: 700-Level, Number Properties, Source: e-GMAT
19Julian bought 6 kilograms of cheese from each of Deli A and Deli B. At Difficulty: 700-Level, Word Problems, Source: 800 Score
20If 20 Swiss Francs is enough to buy 9 notebooks and 3 Difficulty: 700-Level, Inequalities, Word Problems
21What is b in the circle shown above? Difficulty: 700-Level, Geometry, Source: Other - Please specify
22The numbers D, N, and P are positive integers, such that D < N, and N Difficulty: 700-Level, Exponents/Powers, Number Properties, Source: Magoosh
23Is a - 3b an even number? Difficulty: 700-Level, Number Properties
24w, x, y, and z are integers. If z > y > x > w, is |w| > x^2 Difficulty: 700-Level, Absolute Values/Modulus, Inequalities, Source: Kaplan
25If x is a positive integer less than 100 such that x is Difficulty: 700-Level, Algebra, Exponents/Powers, Source: e-GMAT
26If all the N students of a class are classified into groups of either Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Source: e-GMAT
27If a, b, and c are positive integers such that 1/a + 1/b = 1 Difficulty: 700-Level, Fractions/Ratios/Decimals, Inequalities, Source: Manhattan GMAT
28If a, b, x, y are positive integers and a^xb^y= 144, then a + b = ? Difficulty: 700-Level, Algebra, Exponents/Powers, Source: Math Revolution
29The Range of Set A is R. A number having equal value to R Difficulty: 700-Level, Statistics and Sets Problems
30In the picture, quadrilateral ABCD is a parallelogram and Difficulty: 700-Level, Geometry
31If x, y and z are positive integers such that x^4*y^3 = z^2 Difficulty: 700-Level, Number Properties, Source: e-GMAT
32If x, y, and z are all distinct positive integers and the percent Difficulty: 700-Level, Algebra, Number Properties, Percent and Interest Problems, Source: Manhattan GMAT
33A newer machine, working alone at its constant rate Difficulty: 700-Level, Work/Rate Problems, Source: Veritas Prep
34For positive integers n and m (n>m), is the average (arithmetic mean) Difficulty: 700-Level, Number Properties, Statistics and Sets Problems, Source: Math Revolution
35A natural number p, when divided by a certain divisor q, gives Difficulty: 700-Level, Number Properties, Remainders, Source: Jamboree
36At a restaurant, a group of friends ordered four main dishes Difficulty: 700-Level, Min/Max Problems, Source: Manhattan GMAT
37A cube is made up of equal smaller cubes. Two of the sides Difficulty: 700-Level, Geometry
38W, X, Y, and Z represent distinct digits such that WX * YZ = 1995. Wha Difficulty: 700-Level, Number Properties, Source: Veritas Prep
39Three employees, A, B and C, clean a certain conference room each day. Difficulty: 700-Level, Work/Rate Problems, Source: Other - Please specify
40Is x^3 - 6x^2 + 11x - 6 < 0 Difficulty: 700-Level, Inequalities
41The number of elements in set K is an odd number. The minimum value of Difficulty: 700-Level, Statistics and Sets Problems, Source: Math Revolution
42Is 1/(x-y) < y - x Difficulty: 700-Level, Inequalities
43Is y^2 + 7y + xy even? Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties
44Students in a class are arranged to form groups of 4 members each Difficulty: 700-Level, Remainders, Source: Veritas Prep
45In a group of 80 college students, how many own a car? Difficulty: 700-Level, Overlapping Sets, Source: Magoosh
46If x, y, and z are integers, and x < y < z, is z y = y Difficulty: 700-Level, Statistics and Sets Problems, Source: Manhattan GMAT
47A three digit number A with hundreds digit a, tens digit b and units Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Source: Jamboree
48If pqr s is a four-digit number, where p, q, r and s are the digits, Difficulty: 700-Level, Divisibility/Multiples/Factors, Fractions/Ratios/Decimals, Source: Other - Please specify
49If n >2 and n^4-5n^2+4 = 20h, Is h an integer ? Difficulty: 700-Level, Algebra, Arithmetic, Source: Other - Please specify
50If a, b, and c are integers such that 0 < a < b < c < 10, is Difficulty: 700-Level, Divisibility/Multiples/Factors, Source: Manhattan GMAT
51Maria drove a distance without stopping such that she covered first Difficulty: 700-Level, Distance/Rate Problems, Source: Other - Please specify
52Between 1980 and 1985, Pierre’s investment portfolio increas Difficulty: 700-Level, Percent and Interest Problems, Source: Princeton Review
53If x is positive, what is the value of |x – 3| – 2|x – 4| + Difficulty: 700-Level, Absolute Values/Modulus, Inequalities, Source: Manhattan GMAT
54A red box contains 7 ropes, with an average length of 60 cm per rope, Difficulty: 700-Level, Arithmetic, Min/Max Problems, Source: Other - Please specify
55If a and b are positive integers, what is the remainder when ab is Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Remainders, Source: Manhattan GMAT
56A certain ride has 60 people standing in line awaiting admission. If Difficulty: 700-Level, Overlapping Sets, Source: Other - Please specify
57x, y are positive integers. Find the number of even factors of 4x^2 Difficulty: 700-Level, Divisibility/Multiples/Factors, Source: e-GMAT
58A set of positive integers contains twice as many even integers as odd Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Probability
59If a and b are two-digit positive integers greater than 10 Difficulty: 700-Level, Remainders, Source: GMAT Club Tests
60The area of a rectangle is 28 square centimeter. What is the perimeter Difficulty: 700-Level, Algebra, Geometry
61In the xy-coordinate plane, line A is defined by the equation j*x-y=-7 Difficulty: 700-Level, Coordinate Geometry, Source: GMAT Prep
62In the correctly-worked multiplication problem above, each symbol repr Difficulty: 700-Level, Arithmetic, Number Properties, Source: Veritas Prep
63Is |2a − 3b| < |a − b| + |a − 2b| Difficulty: 700-Level, Absolute Values/Modulus
64a, b, and c are three integers such that a and b are less than 100, an Difficulty: 700-Level, Number Properties, Sequences
65If you are buying a product by rounding up to a $1 digit, is the sum o Difficulty: 700-Level, Algebra, Arithmetic, Percent and Interest Problems, Poor Quality, Source: Math Revolution
66Reiko drove from point A to point B at a constant speed, and Difficulty: 700-Level, Distance/Rate Problems, Source: Manhattan GMAT
67A certain diet program calls for eating daily calories from Difficulty: 700-Level, Word Problems, Source: GMAT Paper Tests
68How many prime factors does positive integer n have? Difficulty: 700-Level, Number Properties, Source: Veritas Prep
69A drawer contains 6 socks. If two socks are randomly Difficulty: 700-Level, Probability, Source: GMATPrepNow
70A committee of 2 people is to be formed from a group of 8 Difficulty: 700-Level, Probability
71Set X consists of 9 positive elements. Set Y consists of the Difficulty: 700-Level, Statistics and Sets Problems
72In a sequence of 13 consecutive integers, all of which are Difficulty: 700-Level, Divisibility/Multiples/Factors, Sequences
73Is A + B + C even? Difficulty: 700-Level, Number Properties, Source: GMAT Club Tests
74In the xy-coordinate plane, line L passes through the points (b, a) an Difficulty: 700-Level, Coordinate Geometry, Source: Manhattan GMAT
75If a and b are both positive integers, is b^(a+1) - ba^b odd? Difficulty: 700-Level, Algebra, Number Properties, Source: Manhattan GMAT
76w, x, y and z are positive integers such that y < z < x < w. Difficulty: 700-Level, Remainders, Source: GMATPrepNow
77If N is a positive three-digit number that is greater than 2 Difficulty: 700-Level, Fractions/Ratios/Decimals, Number Properties, Source: Manhattan GMAT
78In the morning, Chris drives from Toronto to Oakville and in the eveni Difficulty: 700-Level, Distance/Rate Problems, Source: Veritas Prep
79Points A, B, C and D lie on a circle of radius 1. Let x be Difficulty: 700-Level, Geometry
80If x and y are negative numbers, is x<y? Difficulty: 700-Level, Inequalities, Source: GMAT Club Tests
81X is a three-digit positive integer in which each digit is either 1 or Difficulty: 700-Level, Fractions/Ratios/Decimals, Remainders, Source: Manhattan GMAT
82A dental licensure exam requires a 75% minimum score in orde Difficulty: 700-Level, Fractions/Ratios/Decimals, Word Problems, Source: Veritas Prep
83If 6xy = x^2*y + 9y, what is the value of xy? Difficulty: 700-Level, Algebra, Source: Manhattan GMAT
84At a particular store, candy bars are normally priced at $1. Difficulty: 700-Level, Word Problems, Source: Manhattan GMAT
85The nth term of an increasing sequence S is given by Sn = Sn-1 + Sn-2 Difficulty: 700-Level, Algebra, Sequences
86If x and y are non zero numbers less than 1, is (y^4 − x^4) > (y^3 − x Difficulty: 700-Level, Inequalities, Source: Jamboree
87If m, n, and p are three-digit integers and m + n = p Difficulty: 700-Level, Number Properties, Source: Manhattan GMAT
88If x, y, and k are positive integers, is k < 10 ? Difficulty: 700-Level, Algebra, Exponents/Powers, Roots, Source: Princeton Review
89Is the integer 2b divisible by 6 ? Difficulty: 700-Level, Divisibility/Multiples/Factors
90How many subordinates does Marcia have? Difficulty: 700-Level, Combinations
91R is a convex polygon. Does R have at least 8 sides? Difficulty: 700-Level, Geometry
92If a, b and c are distinct positive integers, what is the value of (a Difficulty: 700-Level, Exponents/Powers, Source: Other - Please specify
93Each block from bin A is 4 inches tall, while each block from bin B is Difficulty: 700-Level, Algebra, Arithmetic, Min/Max Problems, Source: Other - Please specify
94A certain salesman's yearly income is determined by a base salary plus Difficulty: 700-Level, Percent and Interest Problems, Word Problems, Source: Manhattan GMAT
95If x is a positive integer greater than 1, is x a prime numb Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Source: GMAT Club Tests
96If x and y are nonzero integers, is (x^(-1) + y^(-1))^(-1) > Difficulty: 700-Level, Exponents/Powers, Inequalities, Source: Manhattan GMAT
97If x and y are integers and -x < y < x, does (x^2 - y^2)^(1/2) = x + y Difficulty: 700-Level, Absolute Values/Modulus, Algebra, Coordinate Geometry, Number Properties, Source: GMAT Club Tests
98If 5a=9b=15c, what is the value of a+b+c? Difficulty: 700-Level, Algebra
99A circle is drawn on a coordinate plane. If a line is drawn Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
100In the figure above, SQRE is a square, AB = AC, and AS = AQ. Difficulty: 700-Level, Geometry, Source: Manhattan GMAT

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Originally posted by Bunuel on 21 Aug 2015, 02:42.
Last edited by Bunuel on 01 Feb 2019, 04:45, edited 1 time in total.
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Math Expert
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Re: 100 Hardest and easiest questions for DS  [#permalink]

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New post Updated on: 01 Feb 2019, 04:45
10
37

100 Easiest Data Sufficiency Questions (Jan 1st, 2019 - Feb 1st, 2019)

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)
RankTitleTopics
1What is the value of 10 percent of y? Difficulty: Sub-600 Level, Percent and Interest Problems, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016
2What is the value of x ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: Quant Review 2nd
3What is the number of pages of a certain journal article? The size of Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019
4If a certain vase contains only roses and tulips, how many tulips are Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019
5In College X the number of students enrolled in both a Difficulty: Sub-600 Level, Overlapping Sets, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12
6For which type of investment, J or K, is the annual rate of Difficulty: Sub-600 Level, Percent and Interest Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 2015, Source: OG 12
7In a recent town election, what was the ratio of the number of votes Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019
8How many basic units of currency X are equivalent to 250 basi Difficulty: Sub-600 Level, Arithmetic, Source: Official Guide, Source: OG 2019
9The research funds of a certain company were divided among three depar Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019
10If sequence S has 120 terms, what is the 105th term of S? Difficulty: Sub-600 Level, Sequences, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016
11The symbol R represents one of the following Difficulty: Sub-600 Level, Arithmetic, Functions and Custom Characters, Source: GMAT Hacks
12The figure above represents a circle graph of Company H's total expens Difficulty: Sub-600 Level, Geometry, Graphs and Illustrations, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11
13What was the median annual salary for the employees at Compan Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide, Source: OG 2019
14If p and q are positive, is p/q less than 1? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016
15What is the value of xy? Difficulty: Sub-600 Level, Algebra, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st
16In the xy-plane above, is angle QPR a right angle? Difficulty: Sub-600 Level, Coordinate Geometry, Geometry, Source: Official Guide, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015
17If sequence S has 100 terms, what is the 83rd term of S? Difficulty: Sub-600 Level, Sequences, Source: Other - Please specify
18Is x = 1/y? Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016
19What is the value of n? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep
20If p, q, x, y, and z are different positive integers, which Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st
21Carlotta can drive from her home to her office by one of two Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Official Guide, Source: OG 12, Source: OG 11, Source: OG 10
22What is the value of w^(−2)? Difficulty: Sub-600 Level, Exponents/Powers, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016
23Is p^2 an odd integer? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st
24Is rw = 0? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016
25What is the tenths digit of the number d when it is written as a...... Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Source: Official Guide, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016
26Committee member W wants to schedule a one-hour meeting on T Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st
27Hoses X and Y simultaneously fill an empty swimming pool tha Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 2nd, Source: Quant Review 1st
28Each of the marbles in a jar is either red or white or blue. If one ma Difficulty: Sub-600 Level, Probability, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016
29What is the value of x ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016
30How many men are in a certain company's vanpool program? Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019
31Is x < y? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide, Source: Quant Review 2nd
32For the system of equations given, what is the value of z? Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11
33In a certain class, some students donated cans of food to a local food Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019
34Is x between 0 and 1? Difficulty: Sub-600 Level, Inequalities, Source: GMAT Prep, Source: Quant Review 2019
35What is the value of r/2 + s/2 ? Difficulty: Sub-600 Level, Algebra, Arithmetic, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st
36How many people in a group of 50 own neither a fax machine nor a laser Difficulty: Sub-600 Level, Overlapping Sets, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016
37What is 11% of x? (1) 3/8 of x is 24 (2) 5% of x is 3.2 Difficulty: Sub-600 Level, Arithmetic, Percent and Interest Problems, Source: Manhattan GMAT
38What is the value of n in the list above? Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015
39Is x < y? (1) z < y (2) z < x Difficulty: Sub-600 Level, Inequalities, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 2016, Source: Quant Review 1st
40How many of the students in a certain class are taking both a history Difficulty: Sub-600 Level, Number Properties, Word Problems, Source: GMAT Prep
41Does 2x + 8 = 12 ? (1) 2x + 10 = 14 (2) 3x + 8 = 14 Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: Quant Review 2019
42Machine R and machine S work at their respective constant rates. How Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide, Source: OG 2019
43If n is an integer, is n + 1 odd? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11
44What is the product of v, w, and x? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep EP 1
45A garden store purchased a number of shovels and a number of Difficulty: Sub-600 Level, Word Problems
46The number of seats in the first row of an auditorium is 18 Difficulty: Sub-600 Level, Sequences, Source: Official Guide, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015
47A company bought 3 printers and 1 scanner. What was the price of the Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019
48What is the retail price of a certain calculator? (1) The retail pri Difficulty: Sub-600 Level, Arithmetic, Source: Manhattan GMAT
49What is the greatest integer that is less than t? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep
50A circular pizza is cut into eight wedge-shaped slices of Difficulty: Sub-600 Level, Geometry, Source: Manhattan GMAT
51For all x, the expression x* is defined to be ax + a, where a is...... Difficulty: Sub-600 Level, Functions and Custom Characters, Source: Official Guide, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016
52What is the value of w + q ? (1) 3w=3-3q (2) 5w +5q = 5 Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015
53If sequence S has 200 terms, what is the 192nd term of S Difficulty: Sub-600 Level, Sequences, Source: OG 12
54What is the value of x^3? Difficulty: Sub-600 Level, Absolute Values/Modulus, Algebra, Source: Veritas Prep
55Square ABCD is inscribed in circle O. What is the area of square regio Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016
56What was the range of the selling prices of the 30 wallets sold by a Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016
57What is the value of z in the triangle above? Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11, Source: OG 10
58In the figure above, what is the value of z? Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017
59Was the amount of John's heating bill for February greater than it was Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019
60If x and y are integers, what is the value of y ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 10, Source: Quant Review 2017, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st
61If knz≠0, what is the ratio of k to n? 1) The ratio of k to z is 2 to Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Source: Math Revolution
62What is the value of t? Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017
63In the figure above, segments PQ and PR are each parallel to one of th Difficulty: Sub-600 Level, Coordinate Geometry, Source: GMAT Prep
64The cost of 10 pounds of apples and 2 pounds of grapes was $1 Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 2019
65Does nm =40? (1) 10/n = m/4 (2) 5n = 20 and 8m = 80 Difficulty: Sub-600 Level, Algebra, Source: GMAT Paper Tests
66Is 2x > 2y ? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016
67Water is pumped into a partially filled tank at a constant Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11
68Is x a negative number? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11, Source: OG 10
69What were the gross revenues from ticket sales for a certain Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st
70If the Longfellow Playground is rectangular, what is its width? Difficulty: Sub-600 Level, Geometry, Source: Official Guide [Pre-2000], Source: OG 1988
71In the terminating decimal equivalent of d, what is the number of nonz Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Number Properties, Source: Other - Please specify
72What is the volume of a certain cube? Difficulty: Sub-600 Level, Geometry, Source: GMAT Prep
73What is the volume of the cube above? Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016
74If machine X ran continuously at a uniform rate to fill Difficulty: Sub-600 Level, Work/Rate Problems
75Q is a cube. Find the volume of the cube. Difficulty: Sub-600 Level, Geometry, Source: Magoosh
76What is the value of ab + bc ? (1) b = 5 (2) a + c = 8 Difficulty: Sub-600 Level, Algebra, Source: Grockit
77If x and y are integers, what is the value of x+y? Difficulty: Sub-600 Level, Arithmetic, Inequalities, Source: GMAT Prep
78If x is positive, what is the value of y ? Difficulty: Sub-600 Level, Algebra, Source: GMAT Prep
79Three hoses, x, y, and z, each pump water at a constant rate into a 70 Difficulty: Sub-600 Level, Work/Rate Problems, Source: Other - Please specify
80Is the integer p even? (1) The integer p^2 + 1 is odd. (2) The integer Difficulty: Sub-600 Level, Number Properties, Source: Official Guide, Source: Quant Review 2019
81Is w + h 4 positive? 1) h is positive 2) w is positive Difficulty: Sub-600 Level, Number Properties, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017
82Machine X runs at a constant rate and produces a lot consist Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st
83What was Bill's average speed on his trip of 250 miles from New York Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Manhattan GMAT
84A circular tub has a band painted around its circumference Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11, Source: OG 10
85In a random sample of 80 adults, how many are college Difficulty: Sub-600 Level, Word Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12
86The length of the edging that surrounds circular garden K is Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11
87Is the product of a certain pair of integers even? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep
88How many different 5-person teams can be formed from a group Difficulty: Sub-600 Level, Combinations
89Is m>k? (1) 3m>3k (2) 2m>2k Difficulty: Sub-600 Level, Inequalities, Source: GMAT Prep
90If Sara's age is exactly twice Bill's age, what is Sara's ag Difficulty: Sub-600 Level, Word Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11, Source: OG 10
91What is the volume of a certain cube? Difficulty: Sub-600 Level, Geometry
92What is the value of x? (1) |x| = 4. (2) x^2 = 16. Difficulty: Sub-600 Level, Absolute Values/Modulus, Algebra, Source: GMAT Prep EP 1
93What is the value of a − b ? Difficulty: Sub-600 Level, Algebra, Source: Princeton Review
94What is the value of xy ? Difficulty: Sub-600 Level, Algebra, Source: GMAT Hacks
95If a + b + c = 12, what is the value of b? (1) a + b = 8 (2) b + c = 6 Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 2019
96If i and j are integers, is i + j an even integer? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11
97On a company-sponsored cruise, 2/3 of the passengers were Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11
98What is the radius of the circle above with center O? Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 10, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st
99Point (x, y) has in which quadrant of the rectangular coordinate syste Difficulty: Sub-600 Level, Coordinate Geometry, Source: GMAT Paper Tests, Source: Magoosh, Source: OG 10, Source: Quant Review 1st
100In PQR, if PQ = x, QR = x + 2, and PR = y, which of the Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11

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Originally posted by Bunuel on 21 Aug 2015, 02:43.
Last edited by Bunuel on 01 Feb 2019, 04:45, edited 1 time in total.
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New post 21 Aug 2015, 04:20
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Re: 100 Hardest and easiest questions for DS  [#permalink]

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New post 07 Dec 2015, 08:09
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is there a dump of all these questions rather than click each link?
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New post 09 Jun 2017, 06:33
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is there a dump of all these questions rather than click each link?
Bunuel IF not can you please make one as Its very time consuming due to technical problem
thanks!!
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New post 29 Jun 2017, 20:33
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This is very helpful. Thank you very much for your efforts. You are doing a great service to those who aspire to ace GMAT. Keep up the good work.

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New post 29 Jun 2017, 20:57
Thanks Buñuel for your efforts.[WHITE SMILING FACE]

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100 Hardest and easiest questions for DS  [#permalink]

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New post 24 Aug 2017, 20:55
Hi Bunuel ,

Thanks for the sharing the list of questions.

Do we anywhere have the option to download all the questions in one go or we have to access them separately only.

Thanks!
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Re: 100 Hardest and easiest questions for DS  [#permalink]

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New post 24 Aug 2017, 20:58
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2201neha wrote:
Hi Bunuel ,

Thanks for the sharing the list of questions.

Do we anywhere have the option to download all the questions in one go or we have to access them separately only.

Thanks!


The list is regularly updated so there is no downloadable file.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

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Re: 100 Hardest and easiest questions for DS  [#permalink]

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New post 29 Jan 2018, 22:02
Hi Bunuel
This is extremely helpful, many thanks :)
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Re: 100 Hardest and easiest questions for DS  [#permalink]

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New post 30 May 2018, 08:57
answer choices are not showing. Could anyone let me know to view the answers.
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New post 30 May 2018, 21:47
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Re: 100 Hardest and easiest questions for DS   [#permalink] 30 May 2018, 21:47
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