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100 Hardest and easiest questions for DS
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 Updated on: 01 Feb 2019, 04:45
100 Hardest Data Sufficiency Questions (Jan 1st, 2019 - Feb 1st, 2019) Are you familiar with the GMAT Club's timer?We have pulled timer results from our database and analyzed every question in the forum. Based on those results, we have compiled a list of the hardest questions in each of the question forums we have. Below I am presenting to you the top 100 questions from DS forum. | Data Sufficiency (DS) | | Rank | Title | Topics | | 1 | Train A leaves New York for Boston at 3 PM and travels at | Difficulty: 700-Level, Distance/Rate Problems | | 2 | 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 | | 3 | What is the perimeter of PQRS ? (1) x = 30 degree | Difficulty: 700-Level, Geometry | | 4 | A car dealership carries only sedans and SUVs | Difficulty: 700-Level, Percent and Interest Problems, Word Problems, Source: Veritas Prep | | 5 | In the correctly worked addition problem above, A, B, C, D | Difficulty: 700-Level, Arithmetic, Number Properties, Source: Manhattan GMAT | | 6 | n and k are positive integers. When n is divided by 23, the quotient i | Difficulty: 700-Level, Remainders, Source: GMATPrepNow | | 7 | If n is a prime number greater than 2, is 1/x > 1? | Difficulty: 700-Level, Exponents/Powers, Inequalities, Source: Manhattan GMAT | | 8 | 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 | | 9 | If, in the addition problem above, a, b, c, d, e, f, x, y, a | Difficulty: 700-Level, Arithmetic | | 10 | 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 | | 11 | When 120 is divided by positive single-digit integer m the remainder | Difficulty: 700-Level, Absolute Values/Modulus, Divisibility/Multiples/Factors, Source: Other - Please specify | | 12 | For integers a and b, if (a^3 a^2 b)^1/2 = 7, what is the | Difficulty: 700-Level, Algebra | | 13 | The average (arithmetic mean) of 5 distinct, single digit integers is | Difficulty: 700-Level, Number Properties, Source: Princeton Review | | 14 | Right triangle ABO is drawn in the xy-plane, with OB as hypo | Difficulty: 700-Level, Geometry, Source: Manhattan GMAT | | 15 | The cost of 3 chocolates, 5 biscuits, and 5 ice creams is | Difficulty: 700-Level, Word Problems | | 16 | Abe, Beth, Carl and Duncan are four siblings, among which Abe and Carl | Difficulty: 700-Level, Number Properties, Source: e-GMAT | | 17 | If h and k are both positive integers, are both roots of the equation | Difficulty: 700-Level, Algebra | | 18 | 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 | | 19 | Julian bought 6 kilograms of cheese from each of Deli A and Deli B. At | Difficulty: 700-Level, Word Problems, Source: 800 Score | | 20 | If 20 Swiss Francs is enough to buy 9 notebooks and 3 | Difficulty: 700-Level, Inequalities, Word Problems | | 21 | What is b in the circle shown above? | Difficulty: 700-Level, Geometry, Source: Other - Please specify | | 22 | The numbers D, N, and P are positive integers, such that D < N, and N | Difficulty: 700-Level, Exponents/Powers, Number Properties, Source: Magoosh | | 23 | Is a - 3b an even number? | Difficulty: 700-Level, Number Properties | | 24 | w, x, y, and z are integers. If z > y > x > w, is |w| > x^2 | Difficulty: 700-Level, Absolute Values/Modulus, Inequalities, Source: Kaplan | | 25 | If x is a positive integer less than 100 such that x is | Difficulty: 700-Level, Algebra, Exponents/Powers, Source: e-GMAT | | 26 | If all the N students of a class are classified into groups of either | Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Source: e-GMAT | | 27 | 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 | | 28 | If a, b, x, y are positive integers and a^xb^y= 144, then a + b = ? | Difficulty: 700-Level, Algebra, Exponents/Powers, Source: Math Revolution | | 29 | The Range of Set A is R. A number having equal value to R | Difficulty: 700-Level, Statistics and Sets Problems | | 30 | In the picture, quadrilateral ABCD is a parallelogram and | Difficulty: 700-Level, Geometry | | 31 | If x, y and z are positive integers such that x^4*y^3 = z^2 | Difficulty: 700-Level, Number Properties, Source: e-GMAT | | 32 | 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 | | 33 | A newer machine, working alone at its constant rate | Difficulty: 700-Level, Work/Rate Problems, Source: Veritas Prep | | 34 | For positive integers n and m (n>m), is the average (arithmetic mean) | Difficulty: 700-Level, Number Properties, Statistics and Sets Problems, Source: Math Revolution | | 35 | A natural number p, when divided by a certain divisor q, gives | Difficulty: 700-Level, Number Properties, Remainders, Source: Jamboree | | 36 | At a restaurant, a group of friends ordered four main dishes | Difficulty: 700-Level, Min/Max Problems, Source: Manhattan GMAT | | 37 | A cube is made up of equal smaller cubes. Two of the sides | Difficulty: 700-Level, Geometry | | 38 | W, X, Y, and Z represent distinct digits such that WX * YZ = 1995. Wha | Difficulty: 700-Level, Number Properties, Source: Veritas Prep | | 39 | Three employees, A, B and C, clean a certain conference room each day. | Difficulty: 700-Level, Work/Rate Problems, Source: Other - Please specify | | 40 | Is x^3 - 6x^2 + 11x - 6 < 0 | Difficulty: 700-Level, Inequalities | | 41 | 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 | | 42 | Is 1/(x-y) < y - x | Difficulty: 700-Level, Inequalities | | 43 | Is y^2 + 7y + xy even? | Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties | | 44 | Students in a class are arranged to form groups of 4 members each | Difficulty: 700-Level, Remainders, Source: Veritas Prep | | 45 | In a group of 80 college students, how many own a car? | Difficulty: 700-Level, Overlapping Sets, Source: Magoosh | | 46 | 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 | | 47 | A three digit number A with hundreds digit a, tens digit b and units | Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Source: Jamboree | | 48 | 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 | | 49 | If n >2 and n^4-5n^2+4 = 20h, Is h an integer ? | Difficulty: 700-Level, Algebra, Arithmetic, Source: Other - Please specify | | 50 | If a, b, and c are integers such that 0 < a < b < c < 10, is | Difficulty: 700-Level, Divisibility/Multiples/Factors, Source: Manhattan GMAT | | 51 | Maria drove a distance without stopping such that she covered first | Difficulty: 700-Level, Distance/Rate Problems, Source: Other - Please specify | | 52 | Between 1980 and 1985, Pierre’s investment portfolio increas | Difficulty: 700-Level, Percent and Interest Problems, Source: Princeton Review | | 53 | If x is positive, what is the value of |x – 3| – 2|x – 4| + | Difficulty: 700-Level, Absolute Values/Modulus, Inequalities, Source: Manhattan GMAT | | 54 | A 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 | | 55 | If 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 | | 56 | A certain ride has 60 people standing in line awaiting admission. If | Difficulty: 700-Level, Overlapping Sets, Source: Other - Please specify | | 57 | x, y are positive integers. Find the number of even factors of 4x^2 | Difficulty: 700-Level, Divisibility/Multiples/Factors, Source: e-GMAT | | 58 | A set of positive integers contains twice as many even integers as odd | Difficulty: 700-Level, Divisibility/Multiples/Factors, Number Properties, Probability | | 59 | If a and b are two-digit positive integers greater than 10 | Difficulty: 700-Level, Remainders, Source: GMAT Club Tests | | 60 | The area of a rectangle is 28 square centimeter. What is the perimeter | Difficulty: 700-Level, Algebra, Geometry | | 61 | In the xy-coordinate plane, line A is defined by the equation j*x-y=-7 | Difficulty: 700-Level, Coordinate Geometry, Source: GMAT Prep | | 62 | In the correctly-worked multiplication problem above, each symbol repr | Difficulty: 700-Level, Arithmetic, Number Properties, Source: Veritas Prep | | 63 | Is |2a − 3b| < |a − b| + |a − 2b| | Difficulty: 700-Level, Absolute Values/Modulus | | 64 | a, b, and c are three integers such that a and b are less than 100, an | Difficulty: 700-Level, Number Properties, Sequences | | 65 | If 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 | | 66 | Reiko drove from point A to point B at a constant speed, and | Difficulty: 700-Level, Distance/Rate Problems, Source: Manhattan GMAT | | 67 | A certain diet program calls for eating daily calories from | Difficulty: 700-Level, Word Problems, Source: GMAT Paper Tests | | 68 | How many prime factors does positive integer n have? | Difficulty: 700-Level, Number Properties, Source: Veritas Prep | | 69 | A drawer contains 6 socks. If two socks are randomly | Difficulty: 700-Level, Probability, Source: GMATPrepNow | | 70 | A committee of 2 people is to be formed from a group of 8 | Difficulty: 700-Level, Probability | | 71 | Set X consists of 9 positive elements. Set Y consists of the | Difficulty: 700-Level, Statistics and Sets Problems | | 72 | In a sequence of 13 consecutive integers, all of which are | Difficulty: 700-Level, Divisibility/Multiples/Factors, Sequences | | 73 | Is A + B + C even? | Difficulty: 700-Level, Number Properties, Source: GMAT Club Tests | | 74 | In the xy-coordinate plane, line L passes through the points (b, a) an | Difficulty: 700-Level, Coordinate Geometry, Source: Manhattan GMAT | | 75 | If a and b are both positive integers, is b^(a+1) - ba^b odd? | Difficulty: 700-Level, Algebra, Number Properties, Source: Manhattan GMAT | | 76 | w, x, y and z are positive integers such that y < z < x < w. | Difficulty: 700-Level, Remainders, Source: GMATPrepNow | | 77 | If N is a positive three-digit number that is greater than 2 | Difficulty: 700-Level, Fractions/Ratios/Decimals, Number Properties, Source: Manhattan GMAT | | 78 | In the morning, Chris drives from Toronto to Oakville and in the eveni | Difficulty: 700-Level, Distance/Rate Problems, Source: Veritas Prep | | 79 | Points A, B, C and D lie on a circle of radius 1. Let x be | Difficulty: 700-Level, Geometry | | 80 | If x and y are negative numbers, is x<y? | Difficulty: 700-Level, Inequalities, Source: GMAT Club Tests | | 81 | X is a three-digit positive integer in which each digit is either 1 or | Difficulty: 700-Level, Fractions/Ratios/Decimals, Remainders, Source: Manhattan GMAT | | 82 | A dental licensure exam requires a 75% minimum score in orde | Difficulty: 700-Level, Fractions/Ratios/Decimals, Word Problems, Source: Veritas Prep | | 83 | If 6xy = x^2*y + 9y, what is the value of xy? | Difficulty: 700-Level, Algebra, Source: Manhattan GMAT | | 84 | At a particular store, candy bars are normally priced at $1. | Difficulty: 700-Level, Word Problems, Source: Manhattan GMAT | | 85 | The nth term of an increasing sequence S is given by Sn = Sn-1 + Sn-2 | Difficulty: 700-Level, Algebra, Sequences | | 86 | If x and y are non zero numbers less than 1, is (y^4 − x^4) > (y^3 − x | Difficulty: 700-Level, Inequalities, Source: Jamboree | | 87 | If m, n, and p are three-digit integers and m + n = p | Difficulty: 700-Level, Number Properties, Source: Manhattan GMAT | | 88 | If x, y, and k are positive integers, is k < 10 ? | Difficulty: 700-Level, Algebra, Exponents/Powers, Roots, Source: Princeton Review | | 89 | Is the integer 2b divisible by 6 ? | Difficulty: 700-Level, Divisibility/Multiples/Factors | | 90 | How many subordinates does Marcia have? | Difficulty: 700-Level, Combinations | | 91 | R is a convex polygon. Does R have at least 8 sides? | Difficulty: 700-Level, Geometry | | 92 | If a, b and c are distinct positive integers, what is the value of (a | Difficulty: 700-Level, Exponents/Powers, Source: Other - Please specify | | 93 | Each 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 | | 94 | A certain salesman's yearly income is determined by a base salary plus | Difficulty: 700-Level, Percent and Interest Problems, Word Problems, Source: Manhattan GMAT | | 95 | 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 | | 96 | If x and y are nonzero integers, is (x^(-1) + y^(-1))^(-1) > | Difficulty: 700-Level, Exponents/Powers, Inequalities, Source: Manhattan GMAT | | 97 | If 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 | | 98 | If 5a=9b=15c, what is the value of a+b+c? | Difficulty: 700-Level, Algebra | | 99 | A circle is drawn on a coordinate plane. If a line is drawn | Difficulty: 700-Level, Geometry, Source: Manhattan GMAT | | 100 | In the figure above, SQRE is a square, AB = AC, and AS = AQ. | Difficulty: 700-Level, Geometry, Source: Manhattan GMAT |
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Originally posted by Bunuel on 21 Aug 2015, 02:42.
Last edited by Bunuel on 01 Feb 2019, 04:45, edited 1 time in total.
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Math Expert
Joined: 02 Sep 2009
Posts: 53069
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Re: 100 Hardest and easiest questions for DS
[#permalink]
Show Tags
Updated on: 01 Feb 2019, 04:45
100 Easiest Data Sufficiency Questions (Jan 1st, 2019 - Feb 1st, 2019) Are you familiar with the GMAT Club's timer?We have pulled timer results from our database and analyzed every question in the forum. Based on those results, we have compiled a list of the easiest questions in each of the question forums we have. Below I am presenting to you the top 100 questions from DS forum. | Data Sufficiency (DS) | | Rank | Title | Topics | | 1 | What is the value of 10 percent of y? | Difficulty: Sub-600 Level, Percent and Interest Problems, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 | | 2 | What is the value of x ? | Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: Quant Review 2nd | | 3 | What is the number of pages of a certain journal article? The size of | Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019 | | 4 | If a certain vase contains only roses and tulips, how many tulips are | Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019 | | 5 | In College X the number of students enrolled in both a | Difficulty: Sub-600 Level, Overlapping Sets, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12 | | 6 | For which type of investment, J or K, is the annual rate of | Difficulty: Sub-600 Level, Percent and Interest Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 2015, Source: OG 12 | | 7 | In a recent town election, what was the ratio of the number of votes | Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019 | | 8 | How many basic units of currency X are equivalent to 250 basi | Difficulty: Sub-600 Level, Arithmetic, Source: Official Guide, Source: OG 2019 | | 9 | The research funds of a certain company were divided among three depar | Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019 | | 10 | If sequence S has 120 terms, what is the 105th term of S? | Difficulty: Sub-600 Level, Sequences, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 | | 11 | The symbol R represents one of the following | Difficulty: Sub-600 Level, Arithmetic, Functions and Custom Characters, Source: GMAT Hacks | | 12 | The figure above represents a circle graph of Company H's total expens | Difficulty: Sub-600 Level, Geometry, Graphs and Illustrations, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11 | | 13 | What was the median annual salary for the employees at Compan | Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide, Source: OG 2019 | | 14 | If p and q are positive, is p/q less than 1? | Difficulty: Sub-600 Level, Inequalities, Source: Official Guide, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016 | | 15 | What is the value of xy? | Difficulty: Sub-600 Level, Algebra, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st | | 16 | In the xy-plane above, is angle QPR a right angle? | Difficulty: Sub-600 Level, Coordinate Geometry, Geometry, Source: Official Guide, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015 | | 17 | If sequence S has 100 terms, what is the 83rd term of S? | Difficulty: Sub-600 Level, Sequences, Source: Other - Please specify | | 18 | Is x = 1/y? | Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 | | 19 | What is the value of n? | Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep | | 20 | If p, q, x, y, and z are different positive integers, which | Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st | | 21 | Carlotta can drive from her home to her office by one of two | Difficulty: Sub-600 Level, Distance/Rate Problems, Source: Official Guide, Source: OG 12, Source: OG 11, Source: OG 10 | | 22 | What is the value of w^(−2)? | Difficulty: Sub-600 Level, Exponents/Powers, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 | | 23 | Is p^2 an odd integer? | Difficulty: Sub-600 Level, Number Properties, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st | | 24 | Is rw = 0? | Difficulty: Sub-600 Level, Inequalities, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 | | 25 | 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, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016 | | 26 | Committee member W wants to schedule a one-hour meeting on T | Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st | | 27 | Hoses X and Y simultaneously fill an empty swimming pool tha | Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 2nd, Source: Quant Review 1st | | 28 | 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, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 | | 29 | What is the value of x ? | Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016 | | 30 | How many men are in a certain company's vanpool program? | Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019 | | 31 | Is x < y? | Difficulty: Sub-600 Level, Inequalities, Source: Official Guide, Source: Quant Review 2nd | | 32 | For the system of equations given, what is the value of z? | Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11 | | 33 | In a certain class, some students donated cans of food to a local food | Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019 | | 34 | Is x between 0 and 1? | Difficulty: Sub-600 Level, Inequalities, Source: GMAT Prep, Source: Quant Review 2019 | | 35 | What is the value of r/2 + s/2 ? | Difficulty: Sub-600 Level, Algebra, Arithmetic, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st | | 36 | 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, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 | | 37 | 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 | | 38 | What is the value of n in the list above? | Difficulty: Sub-600 Level, Statistics and Sets Problems, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015 | | 39 | Is x < y? (1) z < y (2) z < x | Difficulty: Sub-600 Level, Inequalities, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 10, Source: Quant Review 2016, Source: Quant Review 1st | | 40 | 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 | | 41 | Does 2x + 8 = 12 ? (1) 2x + 10 = 14 (2) 3x + 8 = 14 | Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: Quant Review 2019 | | 42 | Machine R and machine S work at their respective constant rates. How | Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide, Source: OG 2019 | | 43 | If n is an integer, is n + 1 odd? | Difficulty: Sub-600 Level, Number Properties, Source: Official Guide, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11 | | 44 | What is the product of v, w, and x? | Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep EP 1 | | 45 | A garden store purchased a number of shovels and a number of | Difficulty: Sub-600 Level, Word Problems | | 46 | The number of seats in the first row of an auditorium is 18 | Difficulty: Sub-600 Level, Sequences, Source: Official Guide, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015 | | 47 | A company bought 3 printers and 1 scanner. What was the price of the | Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019 | | 48 | What is the retail price of a certain calculator? (1) The retail pri | Difficulty: Sub-600 Level, Arithmetic, Source: Manhattan GMAT | | 49 | What is the greatest integer that is less than t? | Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep | | 50 | A circular pizza is cut into eight wedge-shaped slices of | Difficulty: Sub-600 Level, Geometry, Source: Manhattan GMAT | | 51 | 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, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016 | | 52 | What is the value of w + q ? (1) 3w=3-3q (2) 5w +5q = 5 | Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015 | | 53 | If sequence S has 200 terms, what is the 192nd term of S | Difficulty: Sub-600 Level, Sequences, Source: OG 12 | | 54 | What is the value of x^3? | Difficulty: Sub-600 Level, Absolute Values/Modulus, Algebra, Source: Veritas Prep | | 55 | Square ABCD is inscribed in circle O. What is the area of square regio | Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 | | 56 | What was the range of the selling prices of the 30 wallets sold by a | Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017, Source: OG 2016 | | 57 | What is the value of z in the triangle above? | Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11, Source: OG 10 | | 58 | In the figure above, what is the value of z? | Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017 | | 59 | Was the amount of John's heating bill for February greater than it was | Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2019 | | 60 | If x and y are integers, what is the value of y ? | Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 10, Source: Quant Review 2017, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st | | 61 | 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 | | 62 | What is the value of t? | Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017 | | 63 | In the figure above, segments PQ and PR are each parallel to one of th | Difficulty: Sub-600 Level, Coordinate Geometry, Source: GMAT Prep | | 64 | The cost of 10 pounds of apples and 2 pounds of grapes was $1 | Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 2019 | | 65 | Does nm =40? (1) 10/n = m/4 (2) 5n = 20 and 8m = 80 | Difficulty: Sub-600 Level, Algebra, Source: GMAT Paper Tests | | 66 | Is 2x > 2y ? | Difficulty: Sub-600 Level, Inequalities, Source: Official Guide, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016 | | 67 | Water is pumped into a partially filled tank at a constant | Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11 | | 68 | Is x a negative number? | Difficulty: Sub-600 Level, Inequalities, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11, Source: OG 10 | | 69 | What were the gross revenues from ticket sales for a certain | Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st | | 70 | If the Longfellow Playground is rectangular, what is its width? | Difficulty: Sub-600 Level, Geometry, Source: Official Guide [Pre-2000], Source: OG 1988 | | 71 | 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 | | 72 | What is the volume of a certain cube? | Difficulty: Sub-600 Level, Geometry, Source: GMAT Prep | | 73 | What is the volume of the cube above? | Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016 | | 74 | If machine X ran continuously at a uniform rate to fill | Difficulty: Sub-600 Level, Work/Rate Problems | | 75 | Q is a cube. Find the volume of the cube. | Difficulty: Sub-600 Level, Geometry, Source: Magoosh | | 76 | What is the value of ab + bc ? (1) b = 5 (2) a + c = 8 | Difficulty: Sub-600 Level, Algebra, Source: Grockit | | 77 | If x and y are integers, what is the value of x+y? | Difficulty: Sub-600 Level, Arithmetic, Inequalities, Source: GMAT Prep | | 78 | If x is positive, what is the value of y ? | Difficulty: Sub-600 Level, Algebra, Source: GMAT Prep | | 79 | Three 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 | | 80 | Is the integer p even? (1) The integer p^2 + 1 is odd. (2) The integer | Difficulty: Sub-600 Level, Number Properties, Source: Official Guide, Source: Quant Review 2019 | | 81 | Is w + h 4 positive? 1) h is positive 2) w is positive | Difficulty: Sub-600 Level, Number Properties, Source: Official Guide, Source: OG 2019, Source: OG 2018, Source: OG 2017 | | 82 | Machine X runs at a constant rate and produces a lot consist | Difficulty: Sub-600 Level, Work/Rate Problems, Source: Official Guide, Source: OG 10, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st | | 83 | 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 | | 84 | A circular tub has a band painted around its circumference | Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11, Source: OG 10 | | 85 | In a random sample of 80 adults, how many are college | Difficulty: Sub-600 Level, Word Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 2018, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12 | | 86 | The length of the edging that surrounds circular garden K is | Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11 | | 87 | Is the product of a certain pair of integers even? | Difficulty: Sub-600 Level, Number Properties, Source: GMAT Prep | | 88 | How many different 5-person teams can be formed from a group | Difficulty: Sub-600 Level, Combinations | | 89 | Is m>k? (1) 3m>3k (2) 2m>2k | Difficulty: Sub-600 Level, Inequalities, Source: GMAT Prep | | 90 | If Sara's age is exactly twice Bill's age, what is Sara's ag | Difficulty: Sub-600 Level, Word Problems, Source: GMAT Paper Tests, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11, Source: OG 10 | | 91 | What is the volume of a certain cube? | Difficulty: Sub-600 Level, Geometry | | 92 | What 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 | | 93 | What is the value of a − b ? | Difficulty: Sub-600 Level, Algebra, Source: Princeton Review | | 94 | What is the value of xy ? | Difficulty: Sub-600 Level, Algebra, Source: GMAT Hacks | | 95 | If a + b + c = 12, what is the value of b? (1) a + b = 8 (2) b + c = 6 | Difficulty: Sub-600 Level, Algebra, Source: Official Guide, Source: OG 2019 | | 96 | If i and j are integers, is i + j an even integer? | Difficulty: Sub-600 Level, Number Properties, Source: Official Guide, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11 | | 97 | On a company-sponsored cruise, 2/3 of the passengers were | Difficulty: Sub-600 Level, Word Problems, Source: Official Guide, Source: OG 2017, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11 | | 98 | What is the radius of the circle above with center O? | Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 10, Source: Quant Review 2019, Source: Quant Review 2018, Source: Quant Review 2017, Source: Quant Review 2016, Source: Quant Review 2nd, Source: Quant Review 1st | | 99 | Point (x, y) has in which quadrant of the rectangular coordinate syste | Difficulty: Sub-600 Level, Coordinate Geometry, Source: GMAT Paper Tests, Source: Magoosh, Source: OG 10, Source: Quant Review 1st | | 100 | In PQR, if PQ = x, QR = x + 2, and PR = y, which of the | Difficulty: Sub-600 Level, Geometry, Source: Official Guide, Source: OG 2015, Source: OG 12, Source: OG 11 |
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Originally posted by Bunuel on 21 Aug 2015, 02:43.
Last edited by Bunuel on 01 Feb 2019, 04:45, edited 1 time in total.
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Math Expert
Joined: 02 Sep 2009
Posts: 53069
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Re: 100 Hardest and easiest questions for DS
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21 Aug 2015, 04:20
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Intern
Joined: 29 Aug 2015
Posts: 8
Concentration: Strategy, Technology
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Re: 100 Hardest and easiest questions for DS
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07 Dec 2015, 08:09
is there a dump of all these questions rather than click each link?
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Joined: 12 Sep 2016
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Re: 100 Hardest and easiest questions for DS
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09 Jun 2017, 06:33
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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Joined: 20 May 2017
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Re: 100 Hardest and easiest questions for DS
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29 Jun 2017, 20:33
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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Intern
Joined: 31 Dec 2012
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Re: 100 Hardest and easiest questions for DS
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29 Jun 2017, 20:57
Thanks Buñuel for your efforts.[WHITE SMILING FACE] Sent from my Moto G Play using GMAT Club Forum mobile app
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100 Hardest and easiest questions for DS
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24 Aug 2017, 20:55
Hi Bunuel , Thanks for the sharing the list of questions. Do we anywhere have the option to download all the questions in one go or we have to access them separately only. Thanks!
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Math Expert
Joined: 02 Sep 2009
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Re: 100 Hardest and easiest questions for DS
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24 Aug 2017, 20:58
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Intern
Joined: 29 Jan 2018
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Re: 100 Hardest and easiest questions for DS
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29 Jan 2018, 22:02
Hi Bunuel This is extremely helpful, many thanks 
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Joined: 30 May 2018
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Re: 100 Hardest and easiest questions for DS
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30 May 2018, 08:57
answer choices are not showing. Could anyone let me know to view the answers.
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Re: 100 Hardest and easiest questions for DS
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30 May 2018, 21:47
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Re: 100 Hardest and easiest questions for DS
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30 May 2018, 21:47
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