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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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150 Hardest Data Sufficiency Questions (May 1st, 2018 - Jun 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
1Train A leaves New York for Boston at 3 PM and travels at Difficulty: 700-Level, Distance/Rate Problems
2In the correctly worked addition problem above, A, B, C, D Difficulty: 700-Level, Arithmetic, Number Properties, Source: Manhattan GMAT
3What is the perimeter of PQRS ? (1) x = 30 degree Difficulty: 700-Level, Geometry
4w, 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
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
7n and k are positive integers. When n is divided by 23, the quotient i Difficulty: 700-Level, Remainders, Source: GMATPrepNow
8If, in the addition problem above, a, b, c, d, e, f, x, y, a Difficulty: 700-Level, Arithmetic
9If n is a prime number greater than 2, is 1/x > 1? Difficulty: 700-Level, Inequalities, Source: Manhattan GMAT
10Right triangle ABO is drawn in the xy-plane, with OB as hypo Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
11Abe, Beth, Carl and Duncan are four siblings, among which Abe and Carl Difficulty: 700-Level, Number Properties, Source: e-GMAT
12The cost of 3 chocolates, 5 biscuits, and 5 ice creams is Difficulty: 700-Level, Word Problems
13Math Revolution and GMAT Club Contest! There is a sequence, 4(10^n), Difficulty: 700-Level, Number Properties, Sequences, Source: Manhattan GMAT, Source: Math Revolution
14For integers a and b, if (a^3 a^2 b)^1/2 = 7, what is the Difficulty: 700-Level, Algebra
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 average (arithmetic mean) of 5 distinct, single digit integers is Difficulty: 700-Level, Number Properties, Source: Princeton Review
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
18Julian bought 6 kilograms of cheese from each of Deli A and Deli B. At Difficulty: 700-Level, Word Problems, Source: 800 Score
19If 20 Swiss Francs is enough to buy 9 notebooks and 3 Difficulty: 700-Level, Inequalities, Word Problems
20What is b in the circle shown above? Difficulty: 700-Level, Geometry, Source: Other - Please specify
21If x, y and z are positive integers such that x^4*y^3 = z^2 Difficulty: 700-Level, Number Properties, Source: e-GMAT
22The Range of Set A is R. A number having equal value to R Difficulty: 700-Level, Statistics and Sets Problems
23If h and k are both positive integers, are both roots of the equation Difficulty: 700-Level, Algebra
24The numbers D, N, and P are positive integers, such that D < N, and N Difficulty: 700-Level, Exponents/Powers, Number Properties, Source: Magoosh
25If x is a positive integer less than 100 such that x is Difficulty: 700-Level, Algebra, Exponents/Powers, 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
27Is a - 3b an even number? Difficulty: 700-Level, Number Properties
28At a restaurant, a group of friends ordered four main dishes Difficulty: 700-Level, Min/Max Problems, Source: Manhattan GMAT
29In the picture, quadrilateral ABCD is a parallelogram and Difficulty: 700-Level, Geometry
30A cube is made up of equal smaller cubes. Two of the sides Difficulty: 700-Level, Geometry
31W, X, Y, and Z represent distinct digits such that WX * YZ = 1995. Wha Difficulty: 700-Level, Number Properties, Source: Veritas Prep
32A natural number p, when divided by a certain divisor q, gives Difficulty: 700-Level, Number Properties, Remainders, Source: Jamboree
33If a, b, and c are positive integers such that 1/a + 1/b = 1 Difficulty: 700-Level, Fractions/Ratios/Decimals, Inequalities, Source: Manhattan GMAT
34Three employees, A, B and C, clean a certain conference room each day. Difficulty: 700-Level, Work/Rate Problems, Source: Other - Please specify
35Is 1/(x-y) < y - x Difficulty: 700-Level, Inequalities
36Students in a class are arranged to form groups of 4 members each Difficulty: 700-Level, Remainders, Source: Veritas Prep
37A newer machine, working alone at its constant rate Difficulty: 700-Level, Work/Rate Problems, Source: Veritas Prep
38If x, y, and z are integers, and x < y < z, is z y = y Difficulty: 700-Level, Statistics and Sets Problems, Source: Manhattan GMAT
39In a group of 80 college students, how many own a car? Difficulty: 700-Level, Overlapping Sets, Source: Magoosh
40How many prime factors does positive integer n have? Difficulty: 700-Level, Number Properties, Source: Veritas Prep
41A certain ride has 60 people standing in line awaiting admission. If Difficulty: 700-Level, Overlapping Sets, Source: Other - Please specify
42Between 1980 and 1985, Pierre’s investment portfolio increas Difficulty: 700-Level, Percent and Interest Problems, Source: Princeton Review
43Is x^3 - 6x^2 + 11x - 6 < 0 Difficulty: 700-Level, Inequalities
44If 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
45In the correctly-worked multiplication problem above, each symbol repr Difficulty: 700-Level, Arithmetic, Number Properties, Source: Veritas Prep
46If a, b, and c are integers such that 0 < a < b < c < 10, is Difficulty: 700-Level, Divisibility/Multiples/Factors, Source: Manhattan GMAT
47If x is positive, what is the value of |x – 3| – 2|x – 4| + Difficulty: 700-Level, Absolute Values/Modulus, Inequalities, Source: Manhattan GMAT
48Is |2a − 3b| < |a − b| + |a − 2b| Difficulty: 700-Level, Absolute Values/Modulus
49If 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
50The area of a rectangle is 28 square centimeter. What is the perimeter Difficulty: 700-Level, Algebra, Geometry
51Is y^2 + 7y + xy even? Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties
52If a and b are two-digit positive integers greater than 10 Difficulty: 700-Level, Remainders, Source: GMAT Club Tests
53A set of positive integers contains twice as many even integers as odd Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Probability
54Reiko drove from point A to point B at a constant speed, and Difficulty: 700-Level, Distance/Rate Problems, Source: Manhattan GMAT
55If 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
56If a, b, x, y are positive integers and a^xb^y= 144, then a + b = ? Difficulty: 700-Level, Algebra, Exponents/Powers, Source: Math Revolution
57If n >2 and n^4-5n^2+4 = 20h, Is h an integer ? Difficulty: 700-Level, Algebra, Arithmetic, Source: Other - Please specify
58In the xy-coordinate plane, line L passes through the points (b, a) an Difficulty: 700-Level, Coordinate Geometry, Source: Manhattan GMAT
59X is a three-digit positive integer in which each digit is either 1 or Difficulty: 700-Level, Fractions/Ratios/Decimals, Remainders, Source: Manhattan GMAT
60Is the exact value of x/y less than 0.5? Difficulty: 700-Level, Fractions/Ratios/Decimals, Source: Economist GMAT Tutor
61A committee of 2 people is to be formed from a group of 8 Difficulty: 700-Level, Probability
62If x and y are negative numbers, is x<y? Difficulty: 700-Level, Inequalities, Source: GMAT Club Tests
63If 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
64The number of elements in set K is an odd number. The minimum value of Difficulty: 700-Level, Statistics and Sets Problems, Source: Math Revolution
65If a, b and c are distinct positive integers, what is the value of (a Difficulty: 700-Level, Exponents/Powers, Source: Other - Please specify
66R is a convex polygon. Does R have at least 8 sides? Difficulty: 700-Level, Geometry
67x, y are positive integers. Find the number of even factors of 4x^2 Difficulty: 700-Level, Divisibility/Multiples/Factors, Source: e-GMAT
68If 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
69If a and b are both positive integers, is b^(a+1) - ba^b odd? Difficulty: 700-Level, Algebra, Number Properties, Source: Manhattan GMAT
70Is A + B + C even? Difficulty: 700-Level, Number Properties, Source: GMAT Club Tests
71Points A, B, C and D lie on a circle of radius 1. Let x be Difficulty: 700-Level, Geometry
72If 6xy = x^2*y + 9y, what is the value of xy? Difficulty: 700-Level, Algebra, Source: Manhattan GMAT
73If N is a positive three-digit number that is greater than 2 Difficulty: 700-Level, Fractions/Ratios/Decimals, Number Properties, Source: Manhattan GMAT
74Set X consists of 9 positive elements. Set Y consists of the Difficulty: 700-Level, Statistics and Sets Problems
75How many subordinates does Marcia have? Difficulty: 700-Level, Combinations
76At a particular store, candy bars are normally priced at $1. Difficulty: 700-Level, Word Problems, Source: Manhattan GMAT
77If 5a=9b=15c, what is the value of a+b+c? Difficulty: 700-Level, Algebra
78A dental licensure exam requires a 75% minimum score in orde Difficulty: 700-Level, Fractions/Ratios/Decimals, Word Problems, Source: Veritas Prep
79In a sequence of 13 consecutive integers, all of which are Difficulty: 700-Level, Divisibility/Multiples/Factors, Sequences
80A certain salesman's yearly income is determined by a base salary plus Difficulty: 700-Level, Percent and Interest Problems, Word Problems, Source: Manhattan GMAT
81a, b, and c are three integers such that a and b are less than 100, an Difficulty: 700-Level, Number Properties, Sequences
82A certain floor of an office building has 1,200 square feet of floor Difficulty: 700-Level, Geometry
83If x and y are nonzero integers, is (x^(-1) + y^(-1))^(-1) > Difficulty: 700-Level, Exponents/Powers, Inequalities, Source: Manhattan GMAT
84If a, b and n are positive integers such that n = 3a – b3 Difficulty: 700-Level, Number Properties, Source: e-GMAT
85Four friends go to Macy’s for shopping and buy a top each. Three of th Difficulty: 700-Level, Word Problems, Source: Veritas Prep
86A circle is drawn on a coordinate plane. If a line is drawn Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
87If 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
88In the figure above, SQRE is a square, AB = AC, and AS = AQ. Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
89A 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
90In the xy-coordinate plane, line A is defined by the equation j*x-y=-7 Difficulty: 700-Level, Coordinate Geometry, Source: GMAT Prep
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
92A certain fruit stand sells only apples for $0.26 each, bananas for $0 Difficulty: 700-Level, Word Problems, Source: Veritas Prep
93In the trapezoid above, with sides a, b, c, and 1, what is the value o Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
94Is the integer 2b divisible by 6 ? Difficulty: 700-Level, Divisibility/Multiples/Factors
95If m, n, and p are three-digit integers and m + n = p Difficulty: 700-Level, Number Properties, Source: Manhattan GMAT
96If xy 0, is x > y? (1) 4x = 3y (2) |y - x| = x - y Difficulty: 700-Level, Absolute Values/Modulus, Inequalities
97A rectangle is plotted on the standard coordinate plane Difficulty: 700-Level, Coordinate Geometry, Source: Grockit
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
100What is the value of y? Difficulty: 700-Level, Algebra, Arithmetic, Roots, Source: Magoosh
101Is n/18 an integer? Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Source: Manhattan GMAT
1028 schools sent a total of 96 students to a math club competition, with Difficulty: 700-Level, Min/Max Problems, Source: Veritas Prep
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
104ax + by=10, ay + bx=12. which one is greater here, x or y ? Difficulty: 700-Level, Inequalities
105A drawer contains 6 socks. If two socks are randomly Difficulty: 700-Level, Probability, Source: GMATPrepNow
106If x and y are positive integers, what is the value of x? Difficulty: 700-Level, Remainders, Source: GMATPrepNow
107Is xy<0 ? (1) x^3*y^5/x*y^2 <0 (2) |x|-|y|<|x-y Difficulty: 700-Level, Absolute Values/Modulus, Inequalities
108A certain diet program calls for eating daily calories from Difficulty: 700-Level, Word Problems, Source: GMAT Paper Tests
109When a positive integer 'x' is divided by a divisor 'd', the remainder Difficulty: 700-Level, Divisibility/Multiples/Factors, Remainders, Source: Other - Please specify
110In the morning, Chris drives from Toronto to Oakville and in the eveni Difficulty: 700-Level, Distance/Rate Problems, Source: Veritas Prep
111Superfast train A leaves Newcastle for Birmingham at 3 PM and travels Difficulty: 700-Level, Distance/Rate Problems, Source: Veritas Prep
112If a number N is decreased by p percent and then the resulting value Difficulty: 700-Level, Algebra, Source: Manhattan GMAT
113Jeff is painting two murals on the front of an old apartment Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
114a, 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
115Of all the attendees at a dinner party, 40% were women. If Difficulty: 700-Level, Overlapping Sets
116If x is an integer, what is the value of x? Difficulty: 700-Level, Absolute Values/Modulus, Source: GMAT Pill
117If 10^a * 3^b * 5^c = 450^n, what is the value of c? Difficulty: 700-Level, Number Properties, Source: Veritas Prep
118Of the 5 numbers, the largest number is 4 greater than the median. Is Difficulty: 700-Level, Statistics and Sets Problems
119If x, y, and z are positive integers, where x > y and z = √x Difficulty: 700-Level, Number Properties, Source: Kaplan
120In triangle ABC (figure shown) drawn on a coordinate plane, A, B and C Difficulty: 700-Level, Coordinate Geometry, Source: Other - Please specify
121In the table above is shown the percent reduction in the Difficulty: 700-Level, Percent and Interest Problems, Word Problems, Source: Princeton Review
122If x, y, and z are positive integers such that x < y < z Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties
123For any integer n greater than 1, factorial denotes the product of all Difficulty: 700-Level, Number Properties, Source: e-GMAT
124Jane can paint the wall in J hours, and Bill can paint the Difficulty: 700-Level, Word Problems, Work/Rate Problems
125If x/y > 2, is 3x + 2y < 18? (1) x - y is less than 2 (2) y - x is les Difficulty: 700-Level, Inequalities
126In a certain company, 25% of the women and 17% of the men participate Difficulty: 700-Level, Word Problems, Source: Magoosh
127A state legislator drafts an income tax proposal that imposes a tax of Difficulty: 700-Level, Arithmetic, Source: Princeton Review
128w, x, y and z are positive integers. When w is divided by x, the quoti Difficulty: 700-Level, Divisibility/Multiples/Factors, Remainders, Source: GMATPrepNow
129If a, b and c are integers such that b > a, is b+c > a Difficulty: 700-Level, Geometry, Inequalities
130If n = x^5*y^7, where x and y are positive integers greater than 1 Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Source: GMAT Club Tests
131If x and y are positive integers is y odd? Difficulty: 700-Level, Algebra, Number Properties, Source: Manhattan GMAT
132A nonprofit group organizes its local fundraisers in teams, Difficulty: 700-Level, Word Problems, Source: Veritas Prep
133If x and y are positive integers, is x a prime number? Difficulty: 700-Level, Absolute Values/Modulus, Algebra, Inequalities, Source: GMAT Club Tests
134Two positive integers a and b are divisible by 5, which is their Difficulty: 700-Level, Number Properties, Source: e-GMAT
135If 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
136Is x^2 + y^2 > 100? Difficulty: 700-Level, Algebra, Exponents/Powers, Source: Veritas Prep
137A person inherited few gold coins from his father. If he Difficulty: 700-Level, Remainders, Word Problems
138In the figure above, ABC is a right triangle with AC as its hypotenuse Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
139The average of a set of 7 integers equal 27. If the smallest number of Difficulty: 700-Level, Min/Max Problems, Source: Other - Please specify
140If p, x, and y are positive integers, y is odd, and p = x^2 Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Remainders
141In quadrilateral ABCD, sides AB and BC each have length √2, Difficulty: 700-Level, Geometry, Source: Manhattan GMAT
142A set of nonnegative integers consists of {x, x + 7, 2x, y, y + 5}. Difficulty: 700-Level, Sequences
143Which of the two values 10^(-2) and 10^(-3), is x more close Difficulty: 700-Level, Arithmetic, Exponents/Powers
144Is product 2*x*5*y an even integer? Difficulty: 700-Level, Number Properties, Source: GMAT Club Tests
145What is the value of | (x+5)/(x+7) |? (1) x2 + 7x – 18 = 0 (2) 3x2 + 4 Difficulty: 700-Level, Absolute Values/Modulus, Algebra, Source: Other - Please specify
146Two cars start moving simultaneously in different directions from poin Difficulty: 700-Level, Distance/Rate Problems, Source: Other - Please specify
147If the original price of an item in a retail store is marked Difficulty: 700-Level, Percent and Interest Problems, Source: Manhattan GMAT
148What is the probability of (x+3)(x+10) being div by 6? Difficulty: 700-Level, Divisibility/Multiples/Factors, Probability, Source: Other - Please specify
149x is an integer and x raised to any odd integer is greater Difficulty: 700-Level, Algebra, Exponents/Powers, Source: Official Guide
150If x and y are integers, does x^y * y^(-x) = 1? Difficulty: 700-Level, Exponents/Powers, Inequalities

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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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150 Easiest Data Sufficiency Questions (May 1st, 2018 - Jun 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
8If sequence S has 120 terms, what is the 105th term of S? Difficulty: Sub-600 Level, Sequences, Source: Official Guide
9Is x = 1/y? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
10Is p^2 an odd integer? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide
11Carlotta can drive from her home to her office by one of two Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Official Guide
12Is x between 0 and 1? Difficulty: Sub-600 Level, Inequalities, Source: GMAT Prep
13For the system of equations given, what is the value of z? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
14Hoses X and Y simultaneously fill an empty swimming pool tha Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide
15Committee member W wants to schedule a one-hour meeting on T Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
16What is the value of r/2 + s/2 ? Difficulty: Sub-600 Level, Algebra, Arithmetic, Source: Official Guide
17If p, q, x, y, and z are different positive integers, which Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide
18What is the value of n in the list above? Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide
19What is the value of xy? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
20What is the value of n? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep
21Is rw = 0? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide
22If sequence S has 100 terms, what is the 83rd term of S? Difficulty: Sub-600 Level, Sequences, Source: Other - Please specify
23The symbol R represents one of the following Difficulty: Sub-600 Level, Arithmetic, Functions and Custom Characters, Source: GMAT Hacks
24What 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
25Is x < y? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide
26If n is an integer, is n + 1 odd? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide
27Each of the marbles in a jar is either red or white or blue. If one ma Difficulty: Sub-600 Level, Probability, Source: Official Guide
28The number of seats in the first row of an auditorium is 18 Difficulty: Sub-600 Level, Sequences, Source: Official Guide
29What is the value of z in the triangle above? Difficulty: Sub-600 Level, Geometry, Source: Official Guide
30What is the value of x ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
31Is x < y? (1) z < y (2) z < x Difficulty: Sub-600 Level, Inequalities, Source: GMAT Paper Tests, Source: Official Guide
32How many people in a group of 50 own neither a fax machine nor a laser Difficulty: Sub-600 Level, Overlapping Sets, Source: Official Guide
33For 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
34A garden store purchased a number of shovels and a number of Difficulty: Sub-600 Level, Word Problems
35What is the value of w + q ? (1) 3w=3-3q (2) 5w +5q = 5 Difficulty: Sub-600 Level, Algebra, Source: Official Guide
36What is the tenths digit of the number d when it is written as a...... Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Source: Official Guide
37A circular pizza is cut into eight wedge-shaped slices of Difficulty: Sub-600 Level, Geometry, Source: Manhattan GMAT
38If sequence S has 200 terms, what is the 192nd term of S Difficulty: Sub-600 Level, Sequences, Source: Official Guide
39What is the product of v, w, and x? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep EP 1
40Square ABCD is inscribed in circle O. What is the area of square regio Difficulty: Sub-600 Level, Geometry, Source: Official Guide
41If p and q are positive, is p/q less than 1? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide
42Is x a negative number? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide
43Water is pumped into a partially filled tank at a constant Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide
44In 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
45If x and y are integers, what is the value of y ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
46In the figure above, what is the value of z? Difficulty: Sub-600 Level, Geometry, Source: Official Guide
47What is the greatest integer that is less than t? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep
48What were the gross revenues from ticket sales for a certain Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
49What was the range of the selling prices of the 30 wallets sold by a Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
50Does nm = 40? Difficulty: Sub-600 Level, Algebra, Source: GMAT Paper Tests
51How many of the students in a certain class are taking both a history Difficulty: Sub-600 Level, Number Properties, Word Problems, Source: GMAT Prep
52What is the value of t? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
53Is w + h 4 positive? 1) h is positive 2) w is positive Difficulty: Sub-600 Level, Number Properties, Source: Official Guide
54What is the value of x^3? Difficulty: Sub-600 Level, Absolute Values/Modulus, Algebra, Source: Veritas Prep
55A circular tub has a band painted around its circumference Difficulty: Sub-600 Level, Geometry, Source: Official Guide
56Is the product of a certain pair of integers even? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep
57What is the retail price of a certain calculator? (1) The retail pri Difficulty: Sub-600 Level, Arithmetic, Source: Manhattan GMAT
58In a random sample of 80 adults, how many are college Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
59If 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
60Is 2x > 2y ? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide
61If Sara's age is exactly twice Bill's age, what is Sara's ag Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
62Machine X runs at a constant rate and produces a lot consist Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide
63If on a fishing trip Jim and Tom each caught some fish, which one Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
64How many different 5-person teams can be formed from a group Difficulty: Sub-600 Level, Combinations
65In PQR, if PQ = x, QR = x + 2, and PR = y, which of the Difficulty: Sub-600 Level, Geometry, Source: Official Guide
66If i and j are integers, is i + j an even integer? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide
67On a company-sponsored cruise, 2/3 of the passengers were Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
68What is the measure of angle YQZ in the figure? Difficulty: Sub-600 Level, Geometry, Source: Grockit
69What is the radius of the circle above with center O? Difficulty: Sub-600 Level, Geometry, Source: Official Guide
70If x and y are integers, what is the value of x+y? Difficulty: Sub-600 Level, Arithmetic, Inequalities, Source: GMAT Prep
71What is the value of x – y ? Difficulty: Sub-600 Level, Algebra, Source: Princeton Review
72The length of the edging that surrounds circular garden K is Difficulty: Sub-600 Level, Geometry, Source: Official Guide
73What amount did Jean earn from the commission on her sales Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
74What is the volume of a certain cube? Difficulty: Sub-600 Level, Geometry
75What 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
76What is the value of ab + bc ? (1) b = 5 (2) a + c = 8 Difficulty: Sub-600 Level, Algebra, Source: Grockit
77What was Bill's average speed on his trip of 250 miles from New York Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Manhattan GMAT
78If machine X ran continuously at a uniform rate to fill Difficulty: Sub-600 Level, Work/Rate Problems
79What is the value of a − b ? Difficulty: Sub-600 Level, Algebra, Source: Princeton Review
80What is the cube root of w? Difficulty: Sub-600 Level, Roots, Source: Official Guide
81In PQR, if PQ = x, QR = x + 2, and PR = y, which of the Difficulty: Sub-600 Level, Geometry, Source: Official Guide
82If the sequence S has 300 terms, what is the 293rd term of S Difficulty: Sub-600 Level, Sequences, Source: Official Guide
83If the Longfellow Playground is rectangular, what is its width? Difficulty: Sub-600 Level, Geometry, Source: Other - Please specify
84How long would it take Sue to paint the room? Difficulty: Sub-600 Level, Work/Rate Problems, Source: Other - Please specify
85Bob purchased 18 cans of soda, some of which contained diet soda. How Difficulty: Sub-600 Level, Word Problems, Source: Princeton Review
86What is the volume of the cube above? Difficulty: Sub-600 Level, Geometry, Source: Official Guide
87The perimeter of a rectangular garden is 360 feet. What is t Difficulty: Sub-600 Level, Geometry, Source: Official Guide
88What is the volume of a certain cube? Difficulty: Sub-600 Level, Geometry, Source: GMAT Prep
89What is the average (arithmetic mean) of j and k ? Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide
90Machines X and Y run simultaneously at their respective Difficulty: Sub-600 Level, Work/Rate Problems
91Is z less than 0? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide
92How many newspapers were sold at a certain newsstand today? Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
93Q is a cube. Find the volume of the cube. Difficulty: Sub-600 Level, Geometry, Source: Magoosh
94In Mr. Smith's class, what is the ratio of the number of boy Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Source: Official Guide
95What is the value of x^2 - y^2 ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
96If n is a positive integer, is n odd? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide
97In 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
98Is a even? Difficulty: Sub-600 Level, Number Properties
99A certain investment earned a fixed rate of 4 percent interest per yea Difficulty: Sub-600 Level, Percent and Interest Problems, Source: Official Guide
100How many different carpool possibilities exist for 12 coworkers from Difficulty: Sub-600 Level, Combinations, Source: Other - Please specify
101If S = {2, 3, x, y}, what is the value of x + y? Difficulty: Sub-600 Level, Number Properties
102If the two floors in a certain building are 9 feet apart Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
103If a certain animated cartoon consists of a total of 17,280 Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Official Guide
104What is the value of xy ? Difficulty: Sub-600 Level, Algebra, Source: GMAT Hacks
105John took a test that had 60 questions numbered from 1 to 60 Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
106If w+ z = 28, what is the value of wz? Difficulty: Sub-600 Level, Algebra, Arithmetic, Source: Official Guide
107Elena receives a salary plus a commission that is equal to a Difficulty: Sub-600 Level, Percent and Interest Problems, Source: Official Guide
108Who types at a faster rate, John or Bob? Difficulty: Sub-600 Level, Work/Rate Problems, Source: Economist GMAT Tutor
109In the figure above, segments PQ and PR are each parallel to one of th Difficulty: Sub-600 Level, Coordinate Geometry, Source: GMAT Prep
110If t denotes the thousandths digit in the decimal Difficulty: Sub-600 Level, Arithmetic, Fractions/Ratios/Decimals, Source: Official Guide
111The total amount that John paid at a certain restaurant Difficulty: Sub-600 Level, Percent and Interest Problems, Source: GMAT Prep QP1
112Three 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
113What was the amount of money donated to a certain charity? Difficulty: Sub-600 Level, Arithmetic, Percent and Interest Problems, Source: Official Guide
114If x ≠ 0, what is the value of (x^p/x^q)^4 ? Difficulty: Sub-600 Level, Algebra, Exponents/Powers, Source: Official Guide
115If r and s are integers, is r divisible by 7? Difficulty: Sub-600 Level, Divisibility/Multiples/Factors, Number Properties
116On Sunday morning, a printing press printed its newspapers at a consta Difficulty: Sub-600 Level, Work/Rate Problems, Source: Manhattan GMAT
117Point (x, y) has in which quadrant of the rectangular coordinate syste Difficulty: Sub-600 Level, Coordinate Geometry, Source: Other - Please specify
118In a certain factory, hours worked by each employee in excess of 40... Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
119If l and w represent the length and width, respectively, of Difficulty: Sub-600 Level, Geometry, Source: Official Guide
120A thoroughly blended biscuit mix includes only flour and bak Difficulty: Sub-600 Level, Mixture Problems
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
122On May 1 of last year, Jasmin invested x dollars in a new Difficulty: Sub-600 Level, Percent and Interest Problems, Source: GMAT Prep QP1
123Three houses are being sold through a real estate agent Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
124A citrus fruit grower receives $15 for each crate of oranges Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
125What is the value of the integer p ? Difficulty: Sub-600 Level, Divisibility/Multiples/Factors, Number Properties, Source: Official Guide
126If A and B are positive integers, is the product AB even? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide
127What is the value of b + c ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
128Is ax = 3 - bx? (1) x(a + b) = 3 (2) a = b = 1.5 and x = 1 Difficulty: Sub-600 Level, Algebra, Source: Official Guide
129For all integers k, the function g is defined by g(k) = ak+4, where a Difficulty: Sub-600 Level, Functions and Custom Characters, Source: Math Revolution
130Does the decimal equivalent of P/Q, where P and Q are Difficulty: Sub-600 Level, Fractions/Ratios/Decimals
131What percent of a group of people are women with red hair? Difficulty: Sub-600 Level, Overlapping Sets, 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 average (arithmetic mean) of the first 90 measurements Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: GMAT Prep EP 1
134A jar contains 30 marbles, of which 20 are red and 10 are bl Difficulty: Sub-600 Level, Probability, Source: Official Guide
135Marcia's bucket can hold a maximum of how many liters of wat Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
136If m/n = 5/3, what is the value of m + n ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide
137What is the area of square ABCD? Difficulty: Sub-600 Level, Geometry, Source: Veritas Prep
138If u, v, and w are integers, is u > 0 ? Difficulty: Sub-600 Level, Algebra, Source: GMAT Prep
139What is the remainder when the positive integer n is divided Difficulty: Sub-600 Level, Remainders, Source: GMAT Prep
140If P and Q are each circular regions, what is the radius of Difficulty: Sub-600 Level, Geometry, Source: Official Guide
141If 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
142If Pat saved $600 of his earnings last month, how much did Difficulty: Sub-600 Level, Word Problems, Source: Official Guide
143If x is an integer, is x|x|<2^x ? Difficulty: Sub-600 Level, Absolute Values/Modulus, Algebra, Inequalities, Source: Official Guide
144If d is a positive integer, is d^1/2 an integer? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide
145Cyclist A leaves point X at 12 noon and travels at constant velocity Difficulty: Sub-600 Level, Work/Rate Problems, Source: Other - Please specify
146What is the average (arithmetic mean) of x and y? Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide
147x-y=? Difficulty: Sub-600 Level, Absolute Values/Modulus, Algebra, Source: Math Revolution
148If n is an integer, is n - 1 even? Difficulty: Sub-600 Level, Number Properties, Source: Grockit
149If none of the students are ambidextrous, what percentage of Difficulty: Sub-600 Level, Overlapping Sets, Source: Manhattan GMAT
150At a certain restaurant, if each hamburger costs the same am 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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Re: 150 Hardest and easiest questions for DS [#permalink]

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

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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
Re: 150 Hardest and easiest questions for DS   [#permalink] 30 May 2018, 22:47
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