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150 Hardest and easiest questions for DS [#permalink ]

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150 Hardest Data Sufficiency Questions (Aug 1st, 2017 - Sep 1st, 2017)

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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) Rank Title Topics 1 A car dealership carries only sedans and SUVs Difficulty: 700-Level, Percent and Interest Problems, Word Problems, Source: Veritas Prep 2 Train A leaves New York for Boston at 3 PM and travels at Difficulty: 700-Level, Distance/Rate Problems 3 What is the perimeter of PQRS ? (1) x = 30 degree Difficulty: 700-Level, Geometry 4 w, 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 5 In the correctly worked addition problem above, A, B, C, D Difficulty: 700-Level, Arithmetic, Number Properties, Source: Manhattan GMAT 6 What is b in the circle shown above? Difficulty: 700-Level, Geometry, Source: Other - Please specify 7 n and k are positive integers. When n is divided by 23, the quotient i Difficulty: 700-Level, Remainders, Source: GMATPrepNow 8 If, in the addition problem above, a, b, c, d, e, f, x, y, a Difficulty: 700-Level, Arithmetic 9 If k is an integer and x(x – k) = k + 1, what is the value of x? Difficulty: 700-Level, Algebra, Source: Other - Please specify 10 The cost of 3 chocolates, 5 biscuits, and 5 ice creams is Difficulty: 700-Level, Word Problems 11 The average (arithmetic mean) of 5 distinct, single digit integers is Difficulty: 700-Level, Number Properties, Source: Princeton Review 12 If n is a prime number greater than 2, is 1/x > 1? Difficulty: 700-Level, Inequalities, Source: Manhattan GMAT 13 Abe, Beth, Carl and Duncan are four siblings, among which Abe and Carl Difficulty: 700-Level, Number Properties, Source: e-GMAT 14 For integers a and b, if (a^3 a^2 b)^1/2 = 7, what is the Difficulty: 700-Level, Algebra 15 P and Q are prime numbers less than 70. What is the units digit of P*Q Difficulty: 700-Level, Number Properties, Source: e-GMAT 16 Right triangle ABO is drawn in the xy-plane, with OB as hypo Difficulty: 700-Level, Geometry, Source: Manhattan GMAT 17 The Range of Set A is R. A number having equal value to R Difficulty: 700-Level, Statistics and Sets Problems 18 If 20 Swiss Francs is enough to buy 9 notebooks and 3 Difficulty: 700-Level, Inequalities, Word Problems 19 If h and k are both positive integers, are both roots of the equation Difficulty: 700-Level, Algebra 20 If x is a positive integer less than 100 such that x is Difficulty: 700-Level, Algebra, Exponents/Powers, Source: e-GMAT 21 If x, y and z are positive integers such that x^4*y^3 = z^2 Difficulty: 700-Level, Number Properties, Source: e-GMAT 22 w, x, y, and z are integers. If z > y > x > w, is |w| > x^2 Difficulty: 700-Level, Absolute Values/Modules, Inequalities, Source: Kaplan 23 Julian bought 6 kilograms of cheese from each of Deli A and Deli B. At Difficulty: 700-Level, Word Problems, Source: 800 Score 24 When 120 is divided by single-digit integer m the remainder is Difficulty: 700-Level, Absolute Values/Modules, Divisibility/Multiples/Factors, Source: Other - Please specify 25 Math Revolution and GMAT Club Contest! There is a sequence, 4(10^n), Difficulty: 700-Level, Number Properties, Sequences, Source: Manhattan GMAT , Source: Math Revolution 26 At a restaurant, a group of friends ordered four main dishes Difficulty: 700-Level, Min/Max Problems, Source: Manhattan GMAT 27 In the picture, quadrilateral ABCD is a parallelogram and Difficulty: 700-Level, Geometry 28 If 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 29 If a, b, and c are positive integers such that 1/a + 1/b = 1 Difficulty: 700-Level, Fractions/Ratios/Decimals, Inequalities, Source: Manhattan GMAT 30 Students in a class are arranged to form groups of 4 members each Difficulty: 700-Level, Remainders, Source: Veritas Prep 31 If x, y, and z are integers, and x < y < z, is z y = y Difficulty: 700-Level, Statistics and Sets Problems, Source: Manhattan GMAT 32 A cube is made up of equal smaller cubes. Two of the sides Difficulty: 700-Level, Geometry 33 A newer machine, working alone at its constant rate Difficulty: 700-Level, Work/Rate Problems, Source: Veritas Prep 34 Is 1/(x-y) < y - x Difficulty: 700-Level, Inequalities 35 Is a - 3b an even number? Difficulty: 700-Level, Number Properties 36 Between 1980 and 1985, Pierre’s investment portfolio increas Difficulty: 700-Level, Percent and Interest Problems, Source: Princeton Review 37 W, X, Y, and Z represent distinct digits such that WX * YZ = 1995. Wha Difficulty: 700-Level, Number Properties, Source: Veritas Prep 38 Three employees, A, B and C, clean a certain conference room each day. Difficulty: 700-Level, Work/Rate Problems, Source: Other - Please specify 39 In a group of 80 college students, how many own a car? (1) Difficulty: 700-Level, Overlapping Sets, Source: Magoosh 40 In the correctly-worked multiplication problem above, each symbol repr Difficulty: 700-Level, Arithmetic, Source: Veritas Prep 41 If x and y are negative numbers, is x<y? Difficulty: 700-Level, Inequalities, Source: GMAT Club Tests 42 A bag contains six tokens, each labeled with one of the inte Difficulty: 700-Level, Divisibility/Multiples/Factors, Probability 43 Is (2a - b)(b - 3c) > 0? Difficulty: 700-Level 44 Is |2a − 3b| < |a − b| + |a − 2b| Difficulty: 700-Level, Absolute Values/Modules 45 If x is positive, what is the value of |x – 3| – 2|x – 4| + Difficulty: 700-Level, Absolute Values/Modules, Inequalities, Source: Manhattan GMAT 46 If 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 47 If a and b are positive integers, what is the remainder when Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Remainders, Source: Manhattan GMAT 48 Is x^3 - 6x^2 + 11x - 6 < 0 Difficulty: 700-Level, Inequalities 49 Is the exact value of x/y less than 0.5? Difficulty: 700-Level, Fractions/Ratios/Decimals, Source: Economist GMAT Tutor 50 The area of a rectangle is 28 square centimeter. What is the perimeter Difficulty: 700-Level, Algebra, Geometry 51 A set of positive integers contains twice as many even integers as odd Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Probability 52 In the xy-coordinate plane, line L passes through the points (b, a) an Difficulty: 700-Level, Coordinate Geometry, Source: Manhattan GMAT 53 x, y are positive integers. Find the number of even factors of 4x^2 Difficulty: 700-Level, Divisibility/Multiples/Factors, Source: e-GMAT 54 Is y^2 + 7y + xy even? Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties 55 Four friends go to Macy’s for shopping and buy a top each. Three of th Difficulty: 700-Level, Word Problems, Source: Veritas Prep 56 If x and y are integers and -x < y < x, does (x^2 - y^2)^(1/2) = x + y Difficulty: 700-Level, Absolute Values/Modules, Algebra, Coordinate Geometry, Number Properties, Source: GMAT Club Tests 57 Reiko drove from point A to point B at a constant speed, and Difficulty: 700-Level, Distance/Rate Problems, Source: Manhattan GMAT 58 A certain floor of an office building has 1,200 square feet of floor Difficulty: 700-Level, Geometry 59 If x and y are positive integers, what is the value of x? Difficulty: 700-Level, Remainders, Source: GMATPrepNow 60 If 6xy = x^2*y + 9y, what is the value of xy? Difficulty: 700-Level, Algebra, Source: Manhattan GMAT 61 If x, y, and z are positive integers, and (x!+x)/z=y, then Difficulty: 700-Level, Algebra, Divisibility/Multiples/Factors, Number Properties 62 If a, b, and c are integers such that 0 < a < b < c < 10, is Difficulty: 700-Level, Divisibility/Multiples/Factors, Source: Manhattan GMAT 63 If a and b are two-digit positive integers greater than 10 Difficulty: 700-Level, Remainders, Source: GMAT Club Tests 64 A committee of 2 people is to be formed from a group of 8 Difficulty: 700-Level, Probability 65 A certain salesman's yearly income is determined by a base Difficulty: 700-Level, Percent and Interest Problems, Word Problems, Source: Manhattan GMAT 66 Points A, B, C and D lie on a circle of radius 1. Let x be Difficulty: 700-Level, Geometry 67 If a and b are both positive integers, is b^(a+1) - ba^b Difficulty: 700-Level, Algebra, Number Properties, Source: Manhattan GMAT 68 Set X consists of 9 positive elements. Set Y consists of the Difficulty: 700-Level, Statistics and Sets Problems 69 How many subordinates does Marcia have? Difficulty: 700-Level, Combinations 70 If 5a=9b=15c, what is the value of a+b+c? Difficulty: 700-Level, Algebra 71 The numbers D, N, and P are positive integers, such that D < N, and N Difficulty: 700-Level, Exponents/Powers, Number Properties, Source: Magoosh 72 How many prime factors does positive integer n have? Difficulty: 700-Level, Number Properties, Source: Veritas Prep 73 R is a convex polygon. Does R have at least 8 sides? Difficulty: 700-Level, Geometry 74 If a, b and n are positive integers such that n = 3a – b3 Difficulty: 700-Level, Number Properties, Source: e-GMAT 75 At a particular store, candy bars are normally priced at $1. Difficulty: 700-Level, Word Problems, Source: Manhattan GMAT 76 Is A + B + C even? Difficulty: 700-Level, Number Properties 77 Is the integer 2b divisible by 6 ? Difficulty: 700-Level, Divisibility/Multiples/Factors 78 A dental licensure exam requires a 75% minimum score in orde Difficulty: 700-Level, Fractions/Ratios/Decimals, Word Problems, Source: Veritas Prep 79 If a number N is decreased by p percent and then the resulting value Difficulty: 700-Level, Algebra, Source: Manhattan GMAT 80 In the figure above, SQRE is a square, AB = AC, and AS = AQ. Difficulty: 700-Level, Geometry, Source: Manhattan GMAT 81 If 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 82 A rectangle is plotted on the standard coordinate plane Difficulty: 700-Level, Coordinate Geometry, Source: Grockit 83 ax + by=10, ay + bx=12. which one is greater here, x or y ? Difficulty: 700-Level, Inequalities 84 In the table above is shown the percent reduction in the Difficulty: 700-Level, Percent and Interest Problems, Word Problems, Source: Princeton Review 85 If N is a positive three-digit number that is greater than 2 Difficulty: 700-Level, Fractions/Ratios/Decimals, Number Properties, Source: Manhattan GMAT 86 When 3-digit integer 6a3 plus 3-digit integer 3b5 is divisible by 9, i Difficulty: 700-Level, Divisibility/Multiples/Factors, Source: Math Revolution 87 If a and b are both positive integers, is b^(a + 1)– b*(a^b) Difficulty: 700-Level, Number Properties 88 If m, n, and p are three-digit integers and m + n = p Difficulty: 700-Level, Algebra, Source: Manhattan GMAT 89 Of the 5 numbers, the largest number is 4 greater than the Difficulty: 700-Level, Statistics and Sets Problems 90 a, b, and c are three integers such that a and b are less than 100, an Difficulty: 700-Level, Number Properties, Sequences 91 Is xy<0 ? (1) x^3*y^5/x*y^2 <0 (2) |x|-|y|<|x-y Difficulty: 700-Level, Absolute Values/Modules, Inequalities 92 The number of elements in set K is an odd number. The minimum value of Difficulty: 700-Level, Statistics and Sets Problems, Source: Math Revolution 93 In a sequence of 13 consecutive integers, all of which are Difficulty: 700-Level, Divisibility/Multiples/Factors, Sequences 94 If xy 0, is x > y? (1) 4x = 3y (2) |y - x| = x - y Difficulty: 700-Level, Absolute Values/Modules, Inequalities 95 In the xy-coordinate plane, line A is defined by the equation j*x-y=-7 Difficulty: 700-Level, Coordinate Geometry, Source: GMAT Prep 96 Is n/18 an integer? Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Source: Manhattan GMAT 97 Jane can paint the wall in J hours, and Bill can paint the Difficulty: 700-Level, Word Problems, Work/Rate Problems 98 A nonprofit group organizes its local fundraisers in teams, Difficulty: 700-Level, Word Problems, Source: Veritas Prep 99 A circle is drawn on a coordinate plane. If a line is drawn Difficulty: 700-Level, Geometry, Source: Manhattan GMAT 100 Of all the attendees at a dinner party, 40% were women. If Difficulty: 700-Level, Overlapping Sets 101 When a positive integer 'x' is divided by a divisor 'd', the remainder Difficulty: 700-Level, Divisibility/Multiples/Factors, Remainders, Source: Other - Please specify 102 If x and y are nonzero integers, is (x^(-1) + y^(-1))^(-1) > Difficulty: 700-Level, Exponents/Powers, Inequalities, Source: Manhattan GMAT 103 If x, y, and z are positive integers, where x > y and z = √x Difficulty: 700-Level, Number Properties, Source: Kaplan 104 In the morning, Chris drives from Toronto to Oakville and in the eveni Difficulty: 700-Level, Distance/Rate Problems, Source: Veritas Prep 105 If (x/y)>2, is 3x+2y<18? (1) x-y is less than 2 (2) Difficulty: 700-Level, Inequalities 106 Jeff is painting two murals on the front of an old apartment Difficulty: 700-Level, Geometry, Source: Manhattan GMAT 107 A drawer contains 6 socks. If two socks are randomly Difficulty: 700-Level, Probability, Source: GMATPrepNow 108 If x, y, and z are positive integers such that x < y < z Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties 109 Is product 2*x*5*y an even integer? Difficulty: 700-Level, Number Properties, Source: GMAT Club Tests 110 If x is an integer, what is the value of x? Difficulty: 700-Level, Absolute Values/Modules, Source: GMAT Pill 111 A person inherited few gold coins from his father. If he Difficulty: 700-Level, Remainders, Word Problems 112 If 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 113 The average of a set of 7 integers equal 27. If the smallest number of Difficulty: 700-Level, Min/Max Problems, Source: Other - Please specify 114 If x and y are positive integers, is x a prime number? Difficulty: 700-Level, Absolute Values/Modules, Algebra, Inequalities, Source: GMAT Club Tests 115 A certain ride has 60 people standing in line awaiting admission. If Difficulty: 700-Level, Overlapping Sets, Source: Other - Please specify 116 A set of nonnegative integers consists of {x, x + 7, 2x, y, y + 5}. Difficulty: 700-Level, Sequences 117 Two positive integers a and b are divisible by 5, which is their Difficulty: 700-Level, Number Properties, Source: e-GMAT 118 In a certain company, 25% of the women and 17% of the men participate Difficulty: 700-Level, Word Problems, Source: Magoosh 119 In the trapezoid above, with sides a, b, c, and 1, what is the value o Difficulty: 700-Level, Geometry, Source: Manhattan GMAT 120 If a, b and c are integers such that b > a, is b+c > a Difficulty: 700-Level, Geometry, Inequalities 121 If 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 122 A line with the equation y = px + q is reflected over the Difficulty: 700-Level, Coordinate Geometry 123 If x and y are positive integers is y odd? Difficulty: 700-Level, Algebra, Number Properties, Source: Manhattan GMAT 124 If x, y and z are integers and xy + z is an odd integer, is Difficulty: 700-Level, Number Properties, Source: GMAT Prep 125 A right circular cone, twice as tall as it is wide at its Difficulty: 700-Level, Geometry 126 x is an integer and x raised to any odd integer is greater Difficulty: 700-Level, Algebra, Exponents/Powers, Source: Official Guide 127 In triangle ABC (figure shown) drawn on a coordinate plane, A, B and C Difficulty: 700-Level, Coordinate Geometry, Source: Other - Please specify 128 Which of the two values 10^(-2) and 10^(-3), is x more close Difficulty: 700-Level, Arithmetic, Exponents/Powers 129 a, 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 130 A car manufacturer organized a test drive of two of its prototypes Difficulty: 700-Level, Overlapping Sets, Source: 800 Score 131 The 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 132 For any integer n greater than 1, factorial denotes the product of all Difficulty: 700-Level, Number Properties, Source: e-GMAT 133 If x and y are integers, does x^y * y^(-x) = 1? Difficulty: 700-Level, Exponents/Powers, Inequalities 134 If list S contains nine distinct integers, at least one of w Difficulty: 700-Level, Statistics and Sets Problems, Source: Manhattan GMAT 135 If p, x, and y are positive integers, y is odd, and p = x^2 Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Remainders 136 If for any positive integer x, d[x] denotes its smallest odd Difficulty: 700-Level, Divisibility/Multiples/Factors, Functions and Custom Characters 137 If 10^a * 3^b * 5^c = 450^n, what is the value of c? Difficulty: 700-Level, Number Properties, Source: Veritas Prep 138 If x, y, and z are positive integers, where x > y and Difficulty: 700-Level, Number Properties 139 The sum of the integers in list S is the same as the sum of Difficulty: 700-Level, Statistics and Sets Problems, Source: GMAT Prep 140 Laura sells encyclopaedias, and her monthly income has two Difficulty: 700-Level, Word Problems 141 What is the value of | (x+5)/(x+7) |? (1) x2 + 7x – 18 = 0 (2) 3x2 + 4 Difficulty: 700-Level, Absolute Values/Modules, Algebra, Source: Other - Please specify 142 Superfast train A leaves Newcastle for Birmingham at 3 PM and travels Difficulty: 700-Level, Distance/Rate Problems, Source: Veritas Prep 143 If vertices of a triangle have coordinates (-2,2), (3,2) and Difficulty: 700-Level, Absolute Values/Modules, Coordinate Geometry, Source: GMAT Club Tests 144 In the xy-plane, region R consists of all the points (x, y) Difficulty: 700-Level, Coordinate Geometry, Inequalities, Source: Official Guide 145 8 schools sent a total of 96 students to a math club competition, with Difficulty: 700-Level, Min/Max Problems, Source: Veritas Prep 146 If the original price of an item in a retail store is marked Difficulty: 700-Level, Percent and Interest Problems, Source: Manhattan GMAT 147 If 2 different representatives are to be selected at random Difficulty: 700-Level, Probability, Source: Official Guide 148 Is x^2 + y^2 > 100? Difficulty: 700-Level, Algebra, Exponents/Powers, Source: Veritas Prep 149 A certain diet program calls for eating daily calories from Difficulty: 700-Level, Word Problems, Source: GMAT Paper Tests 150 Events A and B are independent and have equal probabilities Difficulty: 700-Level, Probability, Source: Veritas Prep

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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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150 Easiest Data Sufficiency Questions (Aug 1st, 2017 - Sep 1st, 2017)

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) Rank Title Topics 1 In College X the number of students enrolled in both a Difficulty: Sub-600 Level, Overlapping Sets, Source: Official Guide 2 What is the value of 10 percent of y? Difficulty: Sub-600 Level, Percent and Interest Problems, Source: Official Guide 3 What is the value of x ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide 4 The figure above represents a circle graph of Company H's Difficulty: Sub-600 Level, Geometry, Graphs and Illustrations, Source: Official Guide 5 For which type of investment, J or K, is the annual rate of Difficulty: Sub-600 Level, Percent and Interest Problems, Source: Official Guide 6 What is the value of w^(−2)? Difficulty: Sub-600 Level, Exponents/Powers, Source: Official Guide 7 In the xy-plane above, is angle QPR a right angle? Difficulty: Sub-600 Level, Coordinate Geometry, Geometry, Source: Official Guide 8 Hoses X and Y simultaneously fill an empty swimming pool tha Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide 9 Committee member W wants to schedule a one-hour meeting on T Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 10 Is x = 1/y? Difficulty: Sub-600 Level, Algebra, Source: Official Guide 11 For the system of equations given, what is the value of z? Difficulty: Sub-600 Level, Algebra, Source: Official Guide 12 If sequence S has 120 terms, what is the 105th term of S? Difficulty: Sub-600 Level, Sequences, Source: Official Guide 13 If p, q, x, y, and z are different positive integers, which Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide 14 Is x between 0 and 1? Difficulty: Sub-600 Level, Inequalities, Source: GMAT Prep 15 What is the value of r/2 + s/2 ? Difficulty: Sub-600 Level, Algebra, Arithmetic, Source: Official Guide 16 Is p^2 an odd integer? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide 17 What is the value of n in the list above? Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide 18 If n is an integer, is n + 1 odd? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide 19 Each of the marbles in a jar is either red or white or blue. If one ma Difficulty: Sub-600 Level, Probability, Source: Official Guide 20 What is the value of z in the triangle above? Difficulty: Sub-600 Level, Geometry, Source: Official Guide 21 What is the value of xy? Difficulty: Sub-600 Level, Algebra, Source: Official Guide 22 Carlotta can drive from her home to her office by one of two Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Official Guide 23 How many people in a group of 50 own neither a fax machine nor a laser Difficulty: Sub-600 Level, Overlapping Sets, Source: Official Guide 24 What is the value of n? Difficulty: Sub-600 Level, Number Properties 25 Is rw = 0? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide 26 Is x < y? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide 27 Is x < y? (1) z < y (2) z < x Difficulty: Sub-600 Level, Inequalities, Source: GMAT Paper Tests, Source: Official Guide 28 Water is pumped into a partially filled tank at a constant Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide 29 The number of seats in the first row of an auditorium is 18 Difficulty: Sub-600 Level, Sequences, Source: Official Guide 30 What were the gross revenues from ticket sales for a certain Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 31 What is the value of w + q ? (1) 3w=3-3q (2) 5w +5q = 5 Difficulty: Sub-600 Level, Algebra, Source: Official Guide 32 Is w + h 4 positive? 1) h is positive 2) w is positive Difficulty: Sub-600 Level, Number Properties, Source: Official Guide 33 Is x a negative number? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide 34 What 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 35 If x and y are integers, what is the value of y ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide 36 The symbol R represents one of the following Difficulty: Sub-600 Level, Arithmetic, Functions and Custom Characters, Source: GMAT Hacks 37 If sequence S has 100 terms, what is the 83rd term of S? Difficulty: Sub-600 Level, Sequences, Source: Other - Please specify 38 Square ABCD is inscribed in circle O. What is the area of square regio Difficulty: Sub-600 Level, Geometry, Source: Official Guide 39 A circular tub has a band painted around its circumference Difficulty: Sub-600 Level, Geometry, Source: Official Guide 40 In the figure above, what is the value of z? Difficulty: Sub-600 Level, Geometry, Source: Official Guide 41 Does nm = 40? Difficulty: Sub-600 Level, Algebra, Source: GMAT Paper Tests 42 For 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 43 How many different 5-person teams can be formed from a group Difficulty: Sub-600 Level, Combinations 44 Machine X runs at a constant rate and produces a lot consist Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide 45 What is the value of a − b ? Difficulty: Sub-600 Level, Algebra, Source: Princeton Review 46 What was the range of the selling prices of the 30 wallets sold by a Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 47 A garden store purchased a number of shovels and a number of Difficulty: Sub-600 Level, Word Problems 48 If machine X ran continuously at a uniform rate to fill Difficulty: Sub-600 Level, Work/Rate Problems 49 What is the average (arithmetic mean) of j and k ? Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide 50 What is the value of t? Difficulty: Sub-600 Level, Algebra, Source: Official Guide 51 If sequence S has 200 terms, what is the 192nd term of S Difficulty: Sub-600 Level, Sequences, Source: Official Guide 52 If i and j are integers, is i + j an even integer? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide 53 In PQR, if PQ = x, QR = x + 2, and PR = y, which of the Difficulty: Sub-600 Level, Geometry, Source: Official Guide 54 In a random sample of 80 adults, how many are college Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 55 On a company-sponsored cruise, 2/3 of the passengers were Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 56 A circular pizza is cut into eight wedge-shaped slices of Difficulty: Sub-600 Level, Geometry, Source: Manhattan GMAT 57 The perimeter of a rectangular garden is 360 feet. What is t Difficulty: Sub-600 Level, Geometry, Source: Official Guide 58 What is the greatest integer that is less than t? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep 59 What is the cube root of w? Difficulty: Sub-600 Level, Roots, Source: Official Guide 60 If the sequence S has 300 terms, what is the 293rd term of S Difficulty: Sub-600 Level, Sequences, Source: Official Guide 61 What is the value of x^3? Difficulty: Sub-600 Level, Absolute Values/Modules, Algebra, Source: Veritas Prep 62 If x and y are integers, what is the value of x+y? Difficulty: Sub-600 Level, Arithmetic, Inequalities, Source: GMAT Prep 63 The length of the edging that surrounds circular garden K is Difficulty: Sub-600 Level, Geometry, Source: Official Guide 64 If p and q are positive, is p/q less than 1? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide 65 What is the radius of the circle above with center O? Difficulty: Sub-600 Level, Geometry, Source: Official Guide 66 In PQR, if PQ = x, QR = x + 2, and PR = y, which of the Difficulty: Sub-600 Level, Geometry, Source: Official Guide 67 If Sara's age is exactly twice Bill's age, what is Sara's ag Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 68 In 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 69 Elena receives a salary plus a commission that is equal to a Difficulty: Sub-600 Level, Percent and Interest Problems, Source: Official Guide 70 In 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 71 What amount did Jean earn from the commission on her sales Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 72 Is z less than 0? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide 73 If i and j are integers, is i + j an even integer? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide 74 If l and w represent the length and width, respectively, of Difficulty: Sub-600 Level, Geometry, Source: Official Guide 75 If w+ z = 28, what is the value of wz? Difficulty: Sub-600 Level, Algebra, Arithmetic, Source: Official Guide 76 What is the value of x^2 - y^2 ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide 77 Is the product of a certain pair of integers even? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep 78 What is the tenths digit of the number d when it is written as a...... Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Source: Official Guide 79 If the two floors in a certain building are 9 feet apart Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 80 If a certain animated cartoon consists of a total of 17,280 Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Official Guide 81 What is the measure of angle YQZ in the figure? Difficulty: Sub-600 Level, Geometry, Source: Grockit 82 What is the product of v, w, and x? Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep EP 1 83 If on a fishing trip Jim and Tom each caught some fish, which one Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 84 If 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 85 What was the amount of money donated to a certain charity? Difficulty: Sub-600 Level, Arithmetic, Percent and Interest Problems, Source: Official Guide 86 A certain investment earned a fixed rate of 4 percent interest per yea Difficulty: Sub-600 Level, Percent and Interest Problems, Source: Official Guide 87 On Sunday morning, a printing press printed its newspapers at a consta Difficulty: Sub-600 Level, Work/Rate Problems, Source: Manhattan GMAT 88 Is a even? Difficulty: Sub-600 Level, Number Properties 89 Who types at a faster rate, John or Bob? Difficulty: Sub-600 Level, Work/Rate Problems, Source: Economist GMAT Tutor 90 What is the value of x – y ? Difficulty: Sub-600 Level, Algebra, Source: Princeton Review 91 What is the value of b + c ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide 92 How many newspapers were sold at a certain newsstand today? Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 93 If n is a positive integer, is n odd? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide 94 If S = {2, 3, x, y}, what is the value of x + y? Difficulty: Sub-600 Level, Number Properties 95 Machines X and Y run simultaneously at their respective Difficulty: Sub-600 Level, Work/Rate Problems 96 Marcia's bucket can hold a maximum of how many liters of wat Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 97 John took a test that had 60 questions numbered from 1 to 60 Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 98 How many of the students in a certain class are taking both a history Difficulty: Sub-600 Level, Number Properties, Word Problems, Source: GMAT Prep 99 What was Bill's average speed on his trip of 250 miles from New York Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Manhattan GMAT 100 In Mr. Smith's class, what is the ratio of the number of boy Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Source: Official Guide 101 What is the volume of a certain cube? Difficulty: Sub-600 Level, Geometry, Source: GMAT Prep 102 Does the decimal equivalent of P/Q, where P and Q are Difficulty: Sub-600 Level, Fractions/Ratios/Decimals 103 Q is a cube. Find the volume of the cube. Difficulty: Sub-600 Level, Geometry, Source: Magoosh 104 How long would it take Sue to paint the room? Difficulty: Sub-600 Level, Work/Rate Problems, Source: Other - Please specify 105 What is the value of x ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide 106 If x is an integer, is x|x|<2^x ? Difficulty: Sub-600 Level, Absolute Values/Modules, Algebra, Inequalities, Source: Official Guide 107 What is the volume of a certain cube? Difficulty: Sub-600 Level, Geometry 108 If t denotes the thousandths digit in the decimal Difficulty: Sub-600 Level, Arithmetic, Fractions/Ratios/Decimals, Source: Official Guide 109 If A and B are positive integers, is the product AB even? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide 110 What is the volume of the cube above? Difficulty: Sub-600 Level, Geometry, Source: Official Guide 111 If m/n = 5/3, what is the value of m + n ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide 112 In the triangle above, does a^2 + b^2 = c^2 ? Difficulty: Sub-600 Level, Geometry, Source: Official Guide 113 If the Longfellow Playground is rectangular, what is its width? Difficulty: Sub-600 Level, Geometry, Source: Other - Please specify 114 What percent of a group of people are women with red hair? Difficulty: Sub-600 Level, Overlapping Sets, Source: Official Guide 115 If d is a positive integer, is d^1/2 an integer? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide 116 Three houses are being sold through a real estate agent Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 117 How many different carpool possibilities exist for 12 coworkers from Difficulty: Sub-600 Level, Combinations, Source: Other - Please specify 118 What is the value of the integer p ? Difficulty: Sub-600 Level, Divisibility/Multiples/Factors, Number Properties, Source: Official Guide 119 If Pat saved $600 of his earnings last month, how much did Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 120 If x#0, what is the value of (x^p/x^q)^4 ? Difficulty: Sub-600 Level, Algebra, Exponents/Powers, Source: Official Guide 121 A thoroughly blended biscuit mix includes only flour and bak Difficulty: Sub-600 Level, Mixture Problems 122 What is the average (arithmetic mean) of x and y? Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide 123 A jar contains 30 marbles, of which 20 are red and 10 are bl Difficulty: Sub-600 Level, Probability, Source: Official Guide 124 A citrus fruit grower receives $15 for each crate of oranges Difficulty: Sub-600 Level, Word Problems, Source: Official Guide 125 What is the value of n in the equation - 25 + 19 + n = S ? Difficulty: Sub-600 Level, Algebra, Source: Official Guide 126 If r and s are integers, is r divisible by 7? Difficulty: Sub-600 Level, Divisibility/Multiples/Factors, Number Properties 127 If t denotes the thousandths digit in the decimal Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Source: Official Guide 128 If P and Q are each circular regions, what is the radius of Difficulty: Sub-600 Level, Geometry, Source: Official Guide 129 What is the value of x? (1) |x| = 4. (2) x^2 = 16. Difficulty: Sub-600 Level, Absolute Values/Modules, Algebra, Source: GMAT Prep EP 1 130 How far is A from C? Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Kaplan 131 If 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 132 If 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 133 In the figure above, what is the measure of angle ABC? Difficulty: Sub-600 Level, Geometry, Source: Official Guide 134 Is the integer x divisible by 36 ? Difficulty: Sub-600 Level, Divisibility/Multiples/Factors, Source: Official Guide 135 What is the area of square ABCD? Difficulty: Sub-600 Level, Geometry, Source: Veritas Prep 136 What is the remainder when the positive integer n is divided Difficulty: Sub-600 Level, Remainders, Source: GMAT Prep 137 If w + z = 28, what is the value of wz Difficulty: Sub-600 Level, Algebra, Source: Official Guide 138 If x + 2y + 1 = y - x, what is the value of x? Difficulty: Sub-600 Level, Algebra, Source: Official Guide 139 If p and q are positive integers and pq = 24, what is the va Difficulty: Sub-600 Level, Algebra, Number Properties, Source: Official Guide 140 A car is being driven on a road. Assuming that the car's wheels turn Difficulty: Sub-600 Level, Geometry 141 A certain bag contains only red balls, blue balls, and green Difficulty: Sub-600 Level, Fractions/Ratios/Decimals, Source: GMAT Prep EP 1 142 On May 1 of last year, Jasmin invested x dollars in a new Difficulty: Sub-600 Level, Percent and Interest Problems, Source: GMAT Prep QP1 143 If x and yare positive, is x/y greater than 1 ? Difficulty: Sub-600 Level, Inequalities, Source: Official Guide 144 If none of the students are ambidextrous, what percentage of Difficulty: Sub-600 Level, Overlapping Sets, Source: Manhattan GMAT 145 What is the average (arithmetic mean) of the first 90 measurements Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: GMAT Prep EP 1 146 What is the value of the integer x ? Difficulty: Sub-600 Level, Number Properties, Source: Official Guide 147 What is the retail price of a certain calculator? (1) The retail pri Difficulty: Sub-600 Level, Arithmetic, Source: Manhattan GMAT 148 If k is a line in xy-plane, what is the slope of k? Difficulty: Sub-600 Level, Coordinate Geometry, Source: GMAT Prep 149 If x, y, and z are numbers, is z = 18 ? Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide 150 If |x| = |y|, is x/y = -1? Difficulty: Sub-600 Level, Absolute Values/Modules, Source: GMAT Prep EP 1

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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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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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Hello from the GMAT Club BumpBot!

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

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09 Jun 2017, 07:33

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

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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.Posted from my mobile device

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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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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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