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150 Hardest and easiest questions for DS

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150 Hardest and easiest questions for DS  [#permalink]

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New post 21 Aug 2015, 03:42
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150 Hardest Data Sufficiency Questions (Aug 1st, 2018 - Sep 1st, 2018)

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 150 questions from DS forum.
Data Sufficiency (DS)
RankTitleTopics
1In the correctly worked addition problem above, A, B, C, D Difficulty: 700-Level, Arithmetic, Number Properties, Source: Manhattan GMAT
2Train A leaves New York for Boston at 3 PM and travels at Difficulty: 700-Level, Distance/Rate Problems
3w, 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
4What is the perimeter of PQRS ? (1) x = 30 degree Difficulty: 700-Level, Geometry
5A car dealership carries only sedans and SUVs Difficulty: 700-Level, Percent and Interest Problems, Word Problems, Source: Veritas Prep
6If k is an integer and x(x – k) = k + 1, what is the value of x? Difficulty: 700-Level, Algebra, Source: Other - Please specify
7If n is a prime number greater than 2, is 1/x > 1? Difficulty: 700-Level, Inequalities, Source: Manhattan GMAT
8n and k are positive integers. When n is divided by 23, the quotient i Difficulty: 700-Level, Remainders, Source: GMATPrepNow
9If, in the addition problem above, a, b, c, d, e, f, x, y, a Difficulty: 700-Level, Arithmetic
10Right triangle ABO is drawn in the xy-plane, with OB as hypo Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
11The average (arithmetic mean) of 5 distinct, single digit integers is Difficulty: 700-Level, Number Properties, Source: Princeton Review
12For integers a and b, if (a^3 a^2 b)^1/2 = 7, what is the Difficulty: 700-Level, Algebra
13Abe, Beth, Carl and Duncan are four siblings, among which Abe and Carl Difficulty: 700-Level, Number Properties, Source: e-GMAT
14Math Revolution and GMAT Club Contest! There is a sequence, 4(10^n), Difficulty: 700-Level, Number Properties, Sequences, Source: Manhattan GMAT, Source: Math Revolution
15When 120 is divided by positive single-digit integer m the remainder Difficulty: 700-Level, Absolute Values/Modulus, Divisibility/Multiples/Factors, Source: Other - Please specify
16The cost of 3 chocolates, 5 biscuits, and 5 ice creams is Difficulty: 700-Level, Word Problems
17P and Q are prime numbers less than 70. What is the units digit of P*Q Difficulty: 700-Level, Number Properties, Source: e-GMAT
18What is b in the circle shown above? Difficulty: 700-Level, Geometry, Source: Other - Please specify
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
21Is a - 3b an even number? Difficulty: 700-Level, Number Properties
22If x is a positive integer less than 100 such that x is Difficulty: 700-Level, Algebra, Exponents/Powers, Source: e-GMAT
23The Range of Set A is R. A number having equal value to R Difficulty: 700-Level, Statistics and Sets Problems
24If h and k are both positive integers, are both roots of the equation Difficulty: 700-Level, Algebra
25If x, y and z are positive integers such that x^4*y^3 = z^2 Difficulty: 700-Level, Number Properties, Source: e-GMAT
26w, x, y, and z are integers. If z > y > x > w, is |w| > x^2 Difficulty: 700-Level, Absolute Values/Modulus, Inequalities, Source: Kaplan
27In the picture, quadrilateral ABCD is a parallelogram and Difficulty: 700-Level, Geometry
28At a restaurant, a group of friends ordered four main dishes Difficulty: 700-Level, Min/Max Problems, Source: Manhattan GMAT
29The numbers D, N, and P are positive integers, such that D < N, and N Difficulty: 700-Level, Exponents/Powers, Number Properties, Source: Magoosh
30If a, b, and c are positive integers such that 1/a + 1/b = 1 Difficulty: 700-Level, Fractions/Ratios/Decimals, Inequalities, Source: Manhattan GMAT
31A cube is made up of equal smaller cubes. Two of the sides Difficulty: 700-Level, Geometry
32Three employees, A, B and C, clean a certain conference room each day. Difficulty: 700-Level, Work/Rate Problems, Source: Other - Please specify
33Is 1/(x-y) < y - x Difficulty: 700-Level, Inequalities
34A newer machine, working alone at its constant rate Difficulty: 700-Level, Work/Rate Problems, Source: Veritas Prep
35Is y^2 + 7y + xy even? Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties
36Maria drove a distance without stopping such that she covered first Difficulty: 700-Level, Distance/Rate Problems, Source: Other - Please specify
37W, X, Y, and Z represent distinct digits such that WX * YZ = 1995. Wha Difficulty: 700-Level, Number Properties, Source: Veritas Prep
38The number of elements in set K is an odd number. The minimum value of Difficulty: 700-Level, Statistics and Sets Problems, Source: Math Revolution
39A natural number p, when divided by a certain divisor q, gives Difficulty: 700-Level, Number Properties, Remainders, Source: Jamboree
40A certain ride has 60 people standing in line awaiting admission. If Difficulty: 700-Level, Overlapping Sets, Source: Other - Please specify
41If x, y, and z are integers, and x < y < z, is z y = y Difficulty: 700-Level, Statistics and Sets Problems, Source: Manhattan GMAT
42A set of positive integers contains twice as many even integers as odd Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Probability
43In a group of 80 college students, how many own a car? Difficulty: 700-Level, Overlapping Sets, Source: Magoosh
44How many prime factors does positive integer n have? Difficulty: 700-Level, Number Properties, Source: Veritas Prep
45If a, b, and c are integers such that 0 < a < b < c < 10, is Difficulty: 700-Level, Divisibility/Multiples/Factors, Source: Manhattan GMAT
46Students in a class are arranged to form groups of 4 members each Difficulty: 700-Level, Remainders, Source: Veritas Prep
47If 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
48If 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
49Between 1980 and 1985, Pierre’s investment portfolio increas Difficulty: 700-Level, Percent and Interest Problems, Source: Princeton Review
50A 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
51If 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
52If x is positive, what is the value of |x – 3| – 2|x – 4| + Difficulty: 700-Level, Absolute Values/Modulus, Inequalities, Source: Manhattan GMAT
53Is |2a − 3b| < |a − b| + |a − 2b| Difficulty: 700-Level, Absolute Values/Modulus
54Is x^3 - 6x^2 + 11x - 6 < 0 Difficulty: 700-Level, Inequalities
55If a, b, x, y are positive integers and a^xb^y= 144, then a + b = ? Difficulty: 700-Level, Algebra, Exponents/Powers, Source: Math Revolution
56A three digit number A with hundreds digit a, tens digit b and units Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Source: Jamboree
57Reiko drove from point A to point B at a constant speed, and Difficulty: 700-Level, Distance/Rate Problems, Source: Manhattan GMAT
58If a and b are two-digit positive integers greater than 10 Difficulty: 700-Level, Remainders, Source: GMAT Club Tests
59a, b, and c are three integers such that a and b are less than 100, an Difficulty: 700-Level, Number Properties, Sequences
60In the correctly-worked multiplication problem above, each symbol repr Difficulty: 700-Level, Arithmetic, Number Properties, Source: Veritas Prep
61If n >2 and n^4-5n^2+4 = 20h, Is h an integer ? Difficulty: 700-Level, Algebra, Arithmetic, Source: Other - Please specify
62The area of a rectangle is 28 square centimeter. What is the perimeter Difficulty: 700-Level, Algebra, Geometry
63x, y are positive integers. Find the number of even factors of 4x^2 Difficulty: 700-Level, Divisibility/Multiples/Factors, Source: e-GMAT
64If 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
65Is the exact value of x/y less than 0.5? Difficulty: 700-Level, Fractions/Ratios/Decimals, Source: Economist GMAT Tutor
66If N is a positive three-digit number that is greater than 2 Difficulty: 700-Level, Fractions/Ratios/Decimals, Number Properties, Source: Manhattan GMAT
67If a, b and c are distinct positive integers, what is the value of (a Difficulty: 700-Level, Exponents/Powers, Source: Other - Please specify
68A committee of 2 people is to be formed from a group of 8 Difficulty: 700-Level, Probability
69w, x, y and z are positive integers such that y < z < x < w. Difficulty: 700-Level, Remainders, Source: GMATPrepNow
70In the xy-coordinate plane, line L passes through the points (b, a) an Difficulty: 700-Level, Coordinate Geometry, Source: Manhattan GMAT
71In the xy-coordinate plane, line A is defined by the equation j*x-y=-7 Difficulty: 700-Level, Coordinate Geometry, Source: GMAT Prep
72Set X consists of 9 positive elements. Set Y consists of the Difficulty: 700-Level, Statistics and Sets Problems
73In a sequence of 13 consecutive integers, all of which are Difficulty: 700-Level, Divisibility/Multiples/Factors, Sequences
74Is A + B + C even? Difficulty: 700-Level, Number Properties, Source: GMAT Club Tests
75For positive integers n and m (n>m), is the average (arithmetic mean) Difficulty: 700-Level, Number Properties, Statistics and Sets Problems, Source: Math Revolution
76If x and y are negative numbers, is x<y? Difficulty: 700-Level, Inequalities, Source: GMAT Club Tests
77If a and b are both positive integers, is b^(a+1) - ba^b odd? Difficulty: 700-Level, Algebra, Number Properties, Source: Manhattan GMAT
78If 5a=9b=15c, what is the value of a+b+c? Difficulty: 700-Level, Algebra
79A dental licensure exam requires a 75% minimum score in orde Difficulty: 700-Level, Fractions/Ratios/Decimals, Word Problems, Source: Veritas Prep
80Points A, B, C and D lie on a circle of radius 1. Let x be Difficulty: 700-Level, Geometry
81If 6xy = x^2*y + 9y, what is the value of xy? Difficulty: 700-Level, Algebra, Source: Manhattan GMAT
82How many subordinates does Marcia have? Difficulty: 700-Level, Combinations
83At a particular store, candy bars are normally priced at $1. Difficulty: 700-Level, Word Problems, Source: Manhattan GMAT
84X is a three-digit positive integer in which each digit is either 1 or Difficulty: 700-Level, Fractions/Ratios/Decimals, Remainders, Source: Manhattan GMAT
85R is a convex polygon. Does R have at least 8 sides? Difficulty: 700-Level, Geometry
86If 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
87If 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
88Four friends go to Macy’s for shopping and buy a top each. Three of th Difficulty: 700-Level, Word Problems, Source: Veritas Prep
89Is the integer 2b divisible by 6 ? Difficulty: 700-Level, Divisibility/Multiples/Factors
90If m, n, and p are three-digit integers and m + n = p Difficulty: 700-Level, Number Properties, Source: Manhattan GMAT
91Each 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
92If a, b and n are positive integers such that n = 3a – b3 Difficulty: 700-Level, Number Properties, Source: e-GMAT
93A certain salesman's yearly income is determined by a base salary plus Difficulty: 700-Level, Percent and Interest Problems, Word Problems, Source: Manhattan GMAT
94In the figure above, SQRE is a square, AB = AC, and AS = AQ. Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
95In the trapezoid above, with sides a, b, c, and 1, what is the value o Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
96If x and y are nonzero integers, is (x^(-1) + y^(-1))^(-1) > Difficulty: 700-Level, Exponents/Powers, Inequalities, Source: Manhattan GMAT
97What is the value of |(x+5)/(x+7)| Difficulty: 700-Level, Absolute Values/Modulus, Algebra, Source: Other - Please specify
98If x, y, and z are positive integers, and (x!+x)/z=y, then Difficulty: 700-Level, Algebra, Divisibility/Multiples/Factors, Number Properties
99When 3-digit integer 6a3 plus 3-digit integer 3b5 is divisible by 9, i Difficulty: 700-Level, Divisibility/Multiples/Factors, Source: Math Revolution
1008 schools sent a total of 96 students to a math club competition, with Difficulty: 700-Level, Min/Max Problems, Source: Veritas Prep
101A rectangle is plotted on the standard coordinate plane Difficulty: 700-Level, Coordinate Geometry, Source: Grockit
102ax + by=10, ay + bx=12. which one is greater here, x or y ? Difficulty: 700-Level, Inequalities
103In the sequence a1,a2,…,an,…,a1=x and an=y–zan−1 for all n>1. Is a3>a2 Difficulty: 700-Level, Sequences, Source: Veritas Prep
104A certain diet program calls for eating daily calories from Difficulty: 700-Level, Word Problems, Source: GMAT Paper Tests
105Superfast train A leaves Newcastle for Birmingham at 3 PM and travels Difficulty: 700-Level, Distance/Rate Problems, Source: Veritas Prep
106Is xy<0 ? (1) x^3*y^5/x*y^2 <0 (2) |x|-|y|<|x-y Difficulty: 700-Level, Absolute Values/Modulus, Inequalities
107If xy 0, is x > y? (1) 4x = 3y (2) |y - x| = x - y Difficulty: 700-Level, Absolute Values/Modulus, Inequalities
108A circle is drawn on a coordinate plane. If a line is drawn Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
109In triangle ABC (figure shown) drawn on a coordinate plane, A, B and C Difficulty: 700-Level, Coordinate Geometry, Source: Other - Please specify
110Is n/18 an integer? Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Source: Manhattan GMAT
111Of all the attendees at a dinner party, 40% were women. If Difficulty: 700-Level, Overlapping Sets
112What is the value of y? Difficulty: 700-Level, Algebra, Arithmetic, Roots, Source: Magoosh
113When a positive integer 'x' is divided by a divisor 'd', the remainder Difficulty: 700-Level, Divisibility/Multiples/Factors, Remainders, Source: Other - Please specify
114A drawer contains 6 socks. If two socks are randomly Difficulty: 700-Level, Probability, Source: GMATPrepNow
115In the morning, Chris drives from Toronto to Oakville and in the eveni Difficulty: 700-Level, Distance/Rate Problems, Source: Veritas Prep
116A certain floor of an office building has 1,200 square feet of floor Difficulty: 700-Level, Geometry
117If x and y are positive integers, what is the value of x? Difficulty: 700-Level, Remainders, Source: GMATPrepNow
118Jeff is painting two murals on the front of an old apartment Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
119Of the 5 numbers, the largest number is 4 greater than the median. Is Difficulty: 700-Level, Statistics and Sets Problems
120If x is an integer, what is the value of x? Difficulty: 700-Level, Absolute Values/Modulus, Source: GMAT Pill
121In the table above is shown the percent reduction in the Difficulty: 700-Level, Percent and Interest Problems, Word Problems, Source: Princeton Review
122If a number N is decreased by p percent and then the resulting value Difficulty: 700-Level, Algebra, Source: Manhattan GMAT
123A certain fruit stand sells only apples for $0.26 each, bananas for $0 Difficulty: 700-Level, Word Problems, Source: Veritas Prep
124Is product 2*x*5*y an even integer? Difficulty: 700-Level, Number Properties, Source: GMAT Club Tests
125If x, y, and z are positive integers, where x > y and z = √x Difficulty: 700-Level, Number Properties, Source: Kaplan
126a, b, c, d, and e are five numbers such that a≤b≤c≤d≤e and e Difficulty: 700-Level, Statistics and Sets Problems, Source: Economist GMAT Tutor
127If m and k are non-zero integers and if y^(m+k) = y^m, what is the Difficulty: 700-Level, Exponents/Powers, Number Properties
128If all the N students of a class are classified into groups of either Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Source: e-GMAT
129If x/y > 2, is 3x + 2y < 18? (1) x - y is less than 2 (2) y - x is les Difficulty: 700-Level, Inequalities
130Jane can paint the wall in J hours, and Bill can paint the Difficulty: 700-Level, Word Problems, Work/Rate Problems
131A nonprofit group organizes its local fundraisers in teams, Difficulty: 700-Level, Word Problems, Source: Veritas Prep
132For any integer n greater than 1, factorial denotes the product of all Difficulty: 700-Level, Number Properties, Source: e-GMAT
133If 10^a * 3^b * 5^c = 450^n, what is the value of c? Difficulty: 700-Level, Number Properties, Source: Veritas Prep
134Robots K, L and M assemble components at their respective constant res Difficulty: 700-Level, Fractions/Ratios/Decimals, Inequalities, Source: Other - Please specify
135In a certain company, 25% of the women and 17% of the men participate Difficulty: 700-Level, Word Problems, Source: Magoosh
136If x, y, and z are positive integers such that x < y < z Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties
137The GMAT is scored on a scale of 200 to 800 in 10 point incr Difficulty: 700-Level, Statistics and Sets Problems, Word Problems, Source: GMAT Prep
138A person inherited few gold coins from his father. If he Difficulty: 700-Level, Remainders, Word Problems
139If x is an integer between 0 and 10 is y less than the average of x an Difficulty: 700-Level, Inequalities, Source: Other - Please specify
140What is the value of p + q + r Difficulty: 700-Level, Fractions/Ratios/Decimals, Percent and Interest Problems, Poor Quality, Source: Other - Please specify
141In the figure above, ABC is a right triangle with AC as its hypotenuse Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
142If a, b and c are integers such that b > a, is b+c > a Difficulty: 700-Level, Geometry, Inequalities
143x is an integer and x raised to any odd integer is greater Difficulty: 700-Level, Algebra, Exponents/Powers, Source: Official Guide
144Which of the two values 10^(-2) and 10^(-3), is x more close Difficulty: 700-Level, Arithmetic, Exponents/Powers
145A set of nonnegative integers consists of {x, x + 7, 2x, y, y + 5}. Difficulty: 700-Level, Sequences
146If x and y are positive integers is y odd? Difficulty: 700-Level, Algebra, Number Properties, Source: Manhattan GMAT
147If the original price of an item in a retail store is marked Difficulty: 700-Level, Percent and Interest Problems, Source: Manhattan GMAT
148If n is an integer greater than 1 is 3^n-2^n divisible by 35 Difficulty: 700-Level, Divisibility/Multiples/Factors, Exponents/Powers, Number Properties
149If x and y are positive integers, is x a prime number? Difficulty: 700-Level, Absolute Values/Modulus, Algebra, Inequalities, Source: GMAT Club Tests
150The average of a set of 7 integers equal 27. If the smallest number of Difficulty: 700-Level, Min/Max Problems, Source: Other - Please specify

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Re: 150 Hardest and easiest questions for DS  [#permalink]

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New post 21 Aug 2015, 03:43
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35

150 Easiest Data Sufficiency Questions (Aug 1st, 2018 - Sep 1st, 2018)

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 150 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
2What is the value of x ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
3In College X the number of students enrolled in both a Difficulty: Sub-600 Level, Overlapping Sets, Source: Official Guide
4For which type of investment, J or K, is the annual rate of Difficulty: Sub-600 Level, Percent and Interest Problems, Source: Official Guide
5What is the value of w^(−2)? Difficulty: Sub-600 Level, Exponents/Powers, Source: Official Guide
6The figure above represents a circle graph of Company H's total expens Difficulty: Sub-600 Level, Geometry, Graphs and Illustrations, Source: Official Guide
7In the xy-plane above, is angle QPR a right angle? Difficulty: Sub-600 Level, Coordinate Geometry, Geometry, Source: Official Guide
8Carlotta can drive from her home to her office by one of two Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Official Guide
9If sequence S has 120 terms, what is the 105th term of S? Difficulty: Sub-600 Level, Sequences, Source: Official Guide
10Is x between 0 and 1? Difficulty: Sub-600 Level, Inequalities, Source: GMAT Prep
11The symbol R represents one of the following Difficulty: Sub-600 Level, Arithmetic, Functions and Custom Characters, Source: GMAT Hacks
12What is the value of n? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep
13Hoses X and Y simultaneously fill an empty swimming pool tha Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide
14What is the value of r/2 + s/2 ? Difficulty: Sub-600 Level, Algebra, Arithmetic, Source: Official Guide
15Is p^2 an odd integer? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide
16Is x = 1/y? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
17How many basic units of currency X are equivalent to 250 basi Difficulty: Sub-600 Level, Arithmetic, Source: Official Guide
18Committee member W wants to schedule a one-hour meeting on T Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
19If sequence S has 100 terms, what is the 83rd term of S? Difficulty: Sub-600 Level, Sequences, Source: Other - Please specify
20If p, q, x, y, and z are different positive integers, which Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide
21What is the value of xy? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
22How many of the students in a certain class are taking both a history Difficulty: Sub-600 Level, Number Properties, Word Problems, Source: GMAT Prep
23For the system of equations given, what is the value of z? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
24If a certain vase contains only roses and tulips, how many tulips are Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
25What is the number of pages of a certain journal article? The size of Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
26Each of the marbles in a jar is either red or white or blue. If one ma Difficulty: Sub-600 Level, Probability, Source: Official Guide
27Is rw = 0? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide
28Is x < y? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide
29If p and q are positive, is p/q less than 1? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide
30What is the value of x ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
31What 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
32What is the value of n in the list above? Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide
33If n is an integer, is n + 1 odd? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide
34Is x < y? (1) z < y (2) z < x Difficulty: Sub-600 Level, Inequalities, Source: GMAT Paper Tests, Source: Official Guide
35How many people in a group of 50 own neither a fax machine nor a laser Difficulty: Sub-600 Level, Overlapping Sets, Source: Official Guide
36What was the median annual salary for the employees at Compan Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide
37The number of seats in the first row of an auditorium is 18 Difficulty: Sub-600 Level, Sequences, Source: Official Guide
38What is the product of v, w, and x? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep EP 1
39What is the tenths digit of the number d when it is written as a...... Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Source: Official Guide
40A garden store purchased a number of shovels and a number of Difficulty: Sub-600 Level, Word Problems
41What is the value of z in the triangle above? Difficulty: Sub-600 Level, Geometry, Source: Official Guide
42What is the value of w + q ? (1) 3w=3-3q (2) 5w +5q = 5 Difficulty: Sub-600 Level, Algebra, Source: Official Guide
43Square ABCD is inscribed in circle O. What is the area of square regio Difficulty: Sub-600 Level, Geometry, Source: Official Guide
44What is the greatest integer that is less than t? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep
45If sequence S has 200 terms, what is the 192nd term of S Difficulty: Sub-600 Level, Sequences, Source: Official Guide
46What is the retail price of a certain calculator? (1) The retail pri Difficulty: Sub-600 Level, Arithmetic, Source: Manhattan GMAT
47Water is pumped into a partially filled tank at a constant Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide
48Is x a negative number? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide
49If x and y are integers, what is the value of y ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
50For 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
51What were the gross revenues from ticket sales for a certain Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
52A circular pizza is cut into eight wedge-shaped slices of Difficulty: Sub-600 Level, Geometry, Source: Manhattan GMAT
53What is the value of x^3? Difficulty: Sub-600 Level, Absolute Values/Modulus, Algebra, Source: Veritas Prep
54In a recent town election, what was the ratio of the number of votes Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
55What was the range of the selling prices of the 30 wallets sold by a Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
56The cost of 10 pounds of apples and 2 pounds of grapes was $1 Difficulty: Sub-600 Level, Algebra, Source: Official Guide
57What is the value of t? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
58In 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
59In the figure above, what is the value of z? Difficulty: Sub-600 Level, Geometry, Source: Official Guide
60Is 2x > 2y ? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide
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
62Is w + h 4 positive? 1) h is positive 2) w is positive Difficulty: Sub-600 Level, Number Properties, Source: Official Guide
63Does nm = 40? Difficulty: Sub-600 Level, Algebra, Source: GMAT Paper Tests
64A circular tub has a band painted around its circumference Difficulty: Sub-600 Level, Geometry, Source: Official Guide
65Machine X runs at a constant rate and produces a lot consist Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide
66What is the volume of a certain cube? Difficulty: Sub-600 Level, Geometry, Source: GMAT Prep
67If x and y are integers, what is the value of x+y? Difficulty: Sub-600 Level, Arithmetic, Inequalities, Source: GMAT Prep
68If Sara's age is exactly twice Bill's age, what is Sara's ag Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
69Is the product of a certain pair of integers even? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep
70The research funds of a certain company were divided among three depar Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
71What is the volume of the cube above? Difficulty: Sub-600 Level, Geometry, Source: Official Guide
72In a random sample of 80 adults, how many are college Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
73What was Bill's average speed on his trip of 250 miles from New York Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Manhattan GMAT
74What 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
75The length of the edging that surrounds circular garden K is Difficulty: Sub-600 Level, Geometry, Source: Official Guide
76How many different 5-person teams can be formed from a group Difficulty: Sub-600 Level, Combinations
77On a company-sponsored cruise, 2/3 of the passengers were Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
78What is the volume of a certain cube? Difficulty: Sub-600 Level, Geometry
79In a certain class, some students donated cans of food to a local food Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
80If machine X ran continuously at a uniform rate to fill Difficulty: Sub-600 Level, Work/Rate Problems
81If i and j are integers, is i + j an even integer? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide
82Q is a cube. Find the volume of the cube. Difficulty: Sub-600 Level, Geometry, Source: Magoosh
83What is the value of ab + bc ? (1) b = 5 (2) a + c = 8 Difficulty: Sub-600 Level, Algebra, Source: Grockit
84In the figure above, segments PQ and PR are each parallel to one of th Difficulty: Sub-600 Level, Coordinate Geometry, Source: GMAT Prep
85If on a fishing trip Jim and Tom each caught some fish, which one Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
86Bob purchased 18 cans of soda, some of which contained diet soda. How Difficulty: Sub-600 Level, Word Problems, Source: Princeton Review
87In PQR, if PQ = x, QR = x + 2, and PR = y, which of the Difficulty: Sub-600 Level, Geometry, Source: Official Guide
88What is the radius of the circle above with center O? Difficulty: Sub-600 Level, Geometry, Source: Official Guide
89How long would it take Sue to paint the room? Difficulty: Sub-600 Level, Work/Rate Problems, Source: Other - Please specify
90What amount did Jean earn from the commission on her sales Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
91How many newspapers were sold at a certain newsstand today? Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
92The perimeter of a rectangular garden is 360 feet. What is t Difficulty: Sub-600 Level, Geometry, Source: Official Guide
93If the sequence S has 300 terms, what is the 293rd term of S Difficulty: Sub-600 Level, Sequences, Source: Official Guide
94What is the value of xy ? Difficulty: Sub-600 Level, Algebra, Source: GMAT Hacks
95Is z less than 0? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide
96Three 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
97What is the cube root of w? Difficulty: Sub-600 Level, Roots, Source: Official Guide
98What is the average (arithmetic mean) of j and k ? Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide
99Machines X and Y run simultaneously at their respective Difficulty: Sub-600 Level, Work/Rate Problems
100What is the value of a − b ? Difficulty: Sub-600 Level, Algebra, Source: Princeton Review
101If the Longfellow Playground is rectangular, what is its width? Difficulty: Sub-600 Level, Geometry, Source: Other - Please specify
102In the month of June, a street vendor sold 10% more hot dogs than he Difficulty: Sub-600 Level, Percent and Interest Problems, Source: Other - Please specify
103How many men are in a certain company's vanpool program? Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
104In PQR, if PQ = x, QR = x + 2, and PR = y, which of the Difficulty: Sub-600 Level, Geometry, Source: Official Guide
105If a certain animated cartoon consists of a total of 17,280 Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Official Guide
106If w+ z = 28, what is the value of wz? Difficulty: Sub-600 Level, Algebra, Arithmetic, Source: Official Guide
107A certain investment earned a fixed rate of 4 percent interest per yea Difficulty: Sub-600 Level, Percent and Interest Problems, Source: Official Guide
108Machine R and machine S work at their respective constant rates. How Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide
109If n is an integer, is n - 1 even? Difficulty: Sub-600 Level, Number Properties, Source: Grockit
110If S = {2, 3, x, y}, what is the value of x + y? Difficulty: Sub-600 Level, Number Properties
111If the two floors in a certain building are 9 feet apart Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
112What is the value of x – y ? Difficulty: Sub-600 Level, Algebra, Source: Princeton Review
113In Mr. Smith's class, what is the ratio of the number of boy Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Source: Official Guide
114John took a test that had 60 questions numbered from 1 to 60 Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
115Point (x, y) has in which quadrant of the rectangular coordinate syste Difficulty: Sub-600 Level, Coordinate Geometry, Source: Magoosh
116Who types at a faster rate, John or Bob? Difficulty: Sub-600 Level, Work/Rate Problems, Source: Economist GMAT Tutor
117If x ≠ 0, what is the value of (x^p/x^q)^4 ? Difficulty: Sub-600 Level, Algebra, Exponents/Powers, Source: Official Guide
118If n is a positive integer, is n odd? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide
119If the ratio of a to b is 4 to 3 and the ratio of b to c is 1 to 5.. Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Source: Kaplan
120The total amount that John paid at a certain restaurant Difficulty: Sub-600 Level, Percent and Interest Problems, Source: GMAT Prep QP1
121If a is a 3-digit integer and b is a 3-digit integer, is the units Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Inequalities, Number Properties, Source: Official Guide
122Is a even? Difficulty: Sub-600 Level, Number Properties
123If r and s are integers, is r divisible by 7? Difficulty: Sub-600 Level, Divisibility/Multiples/Factors, Number Properties
124If l and w represent the length and width, respectively, of Difficulty: Sub-600 Level, Geometry, Source: Official Guide
125On Sunday morning, a printing press printed its newspapers at a consta Difficulty: Sub-600 Level, Work/Rate Problems, Source: Manhattan GMAT
126How many different carpool possibilities exist for 12 coworkers from Difficulty: Sub-600 Level, Combinations, Source: Other - Please specify
127On May 1 of last year, Jasmin invested x dollars in a new Difficulty: Sub-600 Level, Percent and Interest Problems, Source: GMAT Prep QP1
128Elena receives a salary plus a commission that is equal to a Difficulty: Sub-600 Level, Percent and Interest Problems, Source: Official Guide
129A thoroughly blended biscuit mix includes only flour and bak Difficulty: Sub-600 Level, Mixture Problems
130What is the value of x^2 - y^2 ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
131If t denotes the thousandths digit in the decimal Difficulty: Sub-600 Level, Arithmetic, Fractions/Ratios/Decimals, Source: Official Guide
132In the triangle above, does a^2 + b^2 = c^2 ? Difficulty: Sub-600 Level, Geometry, Source: Official Guide
133What is the value of the integer p ? Difficulty: Sub-600 Level, Divisibility/Multiples/Factors, Number Properties, Source: Official Guide
134A citrus fruit grower receives $15 for each crate of oranges Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
135Three houses are being sold through a real estate agent Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
136Is ax = 3 - bx? (1) x(a + b) = 3 (2) a = b = 1.5 and x = 1 Difficulty: Sub-600 Level, Algebra, Source: Official Guide
137What is the area of square ABCD? Difficulty: Sub-600 Level, Geometry, Source: Veritas Prep
138If 3 years ago Jennifer was 22 years old, how old is Carmen now? Difficulty: Sub-600 Level, Word Problems, Source: Manhattan GMAT
139What is the remainder when the positive integer n is divided Difficulty: Sub-600 Level, Remainders, Source: GMAT Prep
140If m/n = 5/3, what is the value of m + n ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
141A jar contains 30 marbles, of which 20 are red and 10 are bl Difficulty: Sub-600 Level, Probability, Source: Official Guide
142What is the average (arithmetic mean) of the first 90 measurements Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: GMAT Prep EP 1
143Was the amount of John's heating bill for February greater than it was Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
144What is the measure of angle YQZ in the figure? Difficulty: Sub-600 Level, Geometry, Source: Grockit
145x-y=? Difficulty: Sub-600 Level, Absolute Values/Modulus, Algebra, Source: Math Revolution
146What is the value of b + c ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
147At a certain restaurant, if each hamburger costs the same am Difficulty: Sub-600 Level, Word Problems, Source: GMAT Prep
148If u, v, and w are integers, is u > 0 ? Difficulty: Sub-600 Level, Algebra, Source: GMAT Prep
149What is the circumference of circle C ? (1) The radius of circle C is Difficulty: Sub-600 Level, Coordinate Geometry, Geometry, Source: Official Guide
150Will the first 10 volumes of a 20-volume encyclopedia fit Difficulty: Sub-600 Level, Word Problems, Source: GMAT Prep

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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.


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Re: 150 Hardest and easiest questions for DS  [#permalink]

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New post 21 Aug 2015, 05:20
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Re: 150 Hardest and easiest questions for DS  [#permalink]

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New post 07 Dec 2015, 09:09
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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, 07:33
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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, 21:33
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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, 21:57
Thanks Buñuel for your efforts.[WHITE SMILING FACE]

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150 Hardest and easiest questions for DS  [#permalink]

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New post 24 Aug 2017, 21:55
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: 150 Hardest and easiest questions for DS  [#permalink]

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New post 24 Aug 2017, 21:58
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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: 150 Hardest and easiest questions for DS  [#permalink]

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New post 29 Jan 2018, 23:02
Hi Bunuel
This is extremely helpful, many thanks :)
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Re: 150 Hardest and easiest questions for DS  [#permalink]

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New post 30 May 2018, 09:57
answer choices are not showing. Could anyone let me know to view the answers.
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New post 30 May 2018, 22:47
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Re: 150 Hardest and easiest questions for DS  [#permalink]

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New post 17 Sep 2018, 17:30
Thanks for sharing
Re: 150 Hardest and easiest questions for DS &nbs [#permalink] 17 Sep 2018, 17:30
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