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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: 700Level, Distance/Rate Problems  2  w, x, y, and z are integers. If w > x > y > z > 0, is y a common  Difficulty: 700Level, Divisibility/Multiples/Factors, Number Properties, Source: Manhattan GMAT  3  What is the perimeter of PQRS ? (1) x = 30 degree  Difficulty: 700Level, Geometry  4  A car dealership carries only sedans and SUVs  Difficulty: 700Level, Percent and Interest Problems, Word Problems, Source: Veritas Prep  5  In the correctly worked addition problem above, A, B, C, D  Difficulty: 700Level, Arithmetic, Number Properties, Source: Manhattan GMAT  6  n and k are positive integers. When n is divided by 23, the quotient i  Difficulty: 700Level, Remainders, Source: GMATPrepNow  7  If n is a prime number greater than 2, is 1/x > 1?  Difficulty: 700Level, 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: 700Level, Algebra, Source: Other  Please specify  9  If, in the addition problem above, a, b, c, d, e, f, x, y, a  Difficulty: 700Level, Arithmetic  10  Math Revolution and GMAT Club Contest! There is a sequence, 4(10^n),  Difficulty: 700Level, Number Properties, Sequences, Source: Manhattan GMAT, Source: Math Revolution  11  When 120 is divided by positive singledigit integer m the remainder  Difficulty: 700Level, 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: 700Level, Algebra  13  The average (arithmetic mean) of 5 distinct, single digit integers is  Difficulty: 700Level, Number Properties, Source: Princeton Review  14  Right triangle ABO is drawn in the xyplane, with OB as hypo  Difficulty: 700Level, Geometry, Source: Manhattan GMAT  15  The cost of 3 chocolates, 5 biscuits, and 5 ice creams is  Difficulty: 700Level, Word Problems  16  Abe, Beth, Carl and Duncan are four siblings, among which Abe and Carl  Difficulty: 700Level, Number Properties, Source: eGMAT  17  If h and k are both positive integers, are both roots of the equation  Difficulty: 700Level, Algebra  18  P and Q are prime numbers less than 70. What is the units digit of P*Q  Difficulty: 700Level, Number Properties, Source: eGMAT  19  Julian bought 6 kilograms of cheese from each of Deli A and Deli B. At  Difficulty: 700Level, Word Problems, Source: 800 Score  20  If 20 Swiss Francs is enough to buy 9 notebooks and 3  Difficulty: 700Level, Inequalities, Word Problems  21  What is b in the circle shown above?  Difficulty: 700Level, Geometry, Source: Other  Please specify  22  The numbers D, N, and P are positive integers, such that D < N, and N  Difficulty: 700Level, Exponents/Powers, Number Properties, Source: Magoosh  23  Is a  3b an even number?  Difficulty: 700Level, Number Properties  24  w, x, y, and z are integers. If z > y > x > w, is w > x^2  Difficulty: 700Level, Absolute Values/Modulus, Inequalities, Source: Kaplan  25  If x is a positive integer less than 100 such that x is  Difficulty: 700Level, Algebra, Exponents/Powers, Source: eGMAT  26  If all the N students of a class are classified into groups of either  Difficulty: 700Level, Divisibility/Multiples/Factors, Number Properties, Source: eGMAT  27  If a, b, and c are positive integers such that 1/a + 1/b = 1  Difficulty: 700Level, 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: 700Level, Algebra, Exponents/Powers, Source: Math Revolution  29  The Range of Set A is R. A number having equal value to R  Difficulty: 700Level, Statistics and Sets Problems  30  In the picture, quadrilateral ABCD is a parallelogram and  Difficulty: 700Level, Geometry  31  If x, y and z are positive integers such that x^4*y^3 = z^2  Difficulty: 700Level, Number Properties, Source: eGMAT  32  If x, y, and z are all distinct positive integers and the percent  Difficulty: 700Level, Algebra, Number Properties, Percent and Interest Problems, Source: Manhattan GMAT  33  A newer machine, working alone at its constant rate  Difficulty: 700Level, Work/Rate Problems, Source: Veritas Prep  34  For positive integers n and m (n>m), is the average (arithmetic mean)  Difficulty: 700Level, Number Properties, Statistics and Sets Problems, Source: Math Revolution  35  A natural number p, when divided by a certain divisor q, gives  Difficulty: 700Level, Number Properties, Remainders, Source: Jamboree  36  At a restaurant, a group of friends ordered four main dishes  Difficulty: 700Level, Min/Max Problems, Source: Manhattan GMAT  37  A cube is made up of equal smaller cubes. Two of the sides  Difficulty: 700Level, Geometry  38  W, X, Y, and Z represent distinct digits such that WX * YZ = 1995. Wha  Difficulty: 700Level, Number Properties, Source: Veritas Prep  39  Three employees, A, B and C, clean a certain conference room each day.  Difficulty: 700Level, Work/Rate Problems, Source: Other  Please specify  40  Is x^3  6x^2 + 11x  6 < 0  Difficulty: 700Level, Inequalities  41  The number of elements in set K is an odd number. The minimum value of  Difficulty: 700Level, Statistics and Sets Problems, Source: Math Revolution  42  Is 1/(xy) < y  x  Difficulty: 700Level, Inequalities  43  Is y^2 + 7y + xy even?  Difficulty: 700Level, Divisibility/Multiples/Factors, Number Properties  44  Students in a class are arranged to form groups of 4 members each  Difficulty: 700Level, Remainders, Source: Veritas Prep  45  In a group of 80 college students, how many own a car?  Difficulty: 700Level, Overlapping Sets, Source: Magoosh  46  If x, y, and z are integers, and x < y < z, is z y = y  Difficulty: 700Level, Statistics and Sets Problems, Source: Manhattan GMAT  47  A three digit number A with hundreds digit a, tens digit b and units  Difficulty: 700Level, Divisibility/Multiples/Factors, Number Properties, Source: Jamboree  48  If pqr s is a fourdigit number, where p, q, r and s are the digits,  Difficulty: 700Level, Divisibility/Multiples/Factors, Fractions/Ratios/Decimals, Source: Other  Please specify  49  If n >2 and n^45n^2+4 = 20h, Is h an integer ?  Difficulty: 700Level, Algebra, Arithmetic, Source: Other  Please specify  50  If a, b, and c are integers such that 0 < a < b < c < 10, is  Difficulty: 700Level, Divisibility/Multiples/Factors, Source: Manhattan GMAT  51  Maria drove a distance without stopping such that she covered first  Difficulty: 700Level, Distance/Rate Problems, Source: Other  Please specify  52  Between 1980 and 1985, Pierre’s investment portfolio increas  Difficulty: 700Level, Percent and Interest Problems, Source: Princeton Review  53  If x is positive, what is the value of x – 3 – 2x – 4 +  Difficulty: 700Level, Absolute Values/Modulus, Inequalities, Source: Manhattan GMAT  54  A red box contains 7 ropes, with an average length of 60 cm per rope,  Difficulty: 700Level, Arithmetic, Min/Max Problems, Source: Other  Please specify  55  If a and b are positive integers, what is the remainder when ab is  Difficulty: 700Level, Divisibility/Multiples/Factors, Number Properties, Remainders, Source: Manhattan GMAT  56  A certain ride has 60 people standing in line awaiting admission. If  Difficulty: 700Level, Overlapping Sets, Source: Other  Please specify  57  x, y are positive integers. Find the number of even factors of 4x^2  Difficulty: 700Level, Divisibility/Multiples/Factors, Source: eGMAT  58  A set of positive integers contains twice as many even integers as odd  Difficulty: 700Level, Divisibility/Multiples/Factors, Number Properties, Probability  59  If a and b are twodigit positive integers greater than 10  Difficulty: 700Level, Remainders, Source: GMAT Club Tests  60  The area of a rectangle is 28 square centimeter. What is the perimeter  Difficulty: 700Level, Algebra, Geometry  61  In the xycoordinate plane, line A is defined by the equation j*xy=7  Difficulty: 700Level, Coordinate Geometry, Source: GMAT Prep  62  In the correctlyworked multiplication problem above, each symbol repr  Difficulty: 700Level, Arithmetic, Number Properties, Source: Veritas Prep  63  Is 2a − 3b < a − b + a − 2b  Difficulty: 700Level, Absolute Values/Modulus  64  a, b, and c are three integers such that a and b are less than 100, an  Difficulty: 700Level, Number Properties, Sequences  65  If you are buying a product by rounding up to a $1 digit, is the sum o  Difficulty: 700Level, 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: 700Level, Distance/Rate Problems, Source: Manhattan GMAT  67  A certain diet program calls for eating daily calories from  Difficulty: 700Level, Word Problems, Source: GMAT Paper Tests  68  How many prime factors does positive integer n have?  Difficulty: 700Level, Number Properties, Source: Veritas Prep  69  A drawer contains 6 socks. If two socks are randomly  Difficulty: 700Level, Probability, Source: GMATPrepNow  70  A committee of 2 people is to be formed from a group of 8  Difficulty: 700Level, Probability  71  Set X consists of 9 positive elements. Set Y consists of the  Difficulty: 700Level, Statistics and Sets Problems  72  In a sequence of 13 consecutive integers, all of which are  Difficulty: 700Level, Divisibility/Multiples/Factors, Sequences  73  Is A + B + C even?  Difficulty: 700Level, Number Properties, Source: GMAT Club Tests  74  In the xycoordinate plane, line L passes through the points (b, a) an  Difficulty: 700Level, Coordinate Geometry, Source: Manhattan GMAT  75  If a and b are both positive integers, is b^(a+1)  ba^b odd?  Difficulty: 700Level, Algebra, Number Properties, Source: Manhattan GMAT  76  w, x, y and z are positive integers such that y < z < x < w.  Difficulty: 700Level, Remainders, Source: GMATPrepNow  77  If N is a positive threedigit number that is greater than 2  Difficulty: 700Level, Fractions/Ratios/Decimals, Number Properties, Source: Manhattan GMAT  78  In the morning, Chris drives from Toronto to Oakville and in the eveni  Difficulty: 700Level, Distance/Rate Problems, Source: Veritas Prep  79  Points A, B, C and D lie on a circle of radius 1. Let x be  Difficulty: 700Level, Geometry  80  If x and y are negative numbers, is x<y?  Difficulty: 700Level, Inequalities, Source: GMAT Club Tests  81  X is a threedigit positive integer in which each digit is either 1 or  Difficulty: 700Level, Fractions/Ratios/Decimals, Remainders, Source: Manhattan GMAT  82  A dental licensure exam requires a 75% minimum score in orde  Difficulty: 700Level, Fractions/Ratios/Decimals, Word Problems, Source: Veritas Prep  83  If 6xy = x^2*y + 9y, what is the value of xy?  Difficulty: 700Level, Algebra, Source: Manhattan GMAT  84  At a particular store, candy bars are normally priced at $1.  Difficulty: 700Level, Word Problems, Source: Manhattan GMAT  85  The nth term of an increasing sequence S is given by Sn = Sn1 + Sn2  Difficulty: 700Level, Algebra, Sequences  86  If x and y are non zero numbers less than 1, is (y^4 − x^4) > (y^3 − x  Difficulty: 700Level, Inequalities, Source: Jamboree  87  If m, n, and p are threedigit integers and m + n = p  Difficulty: 700Level, Number Properties, Source: Manhattan GMAT  88  If x, y, and k are positive integers, is k < 10 ?  Difficulty: 700Level, Algebra, Exponents/Powers, Roots, Source: Princeton Review  89  Is the integer 2b divisible by 6 ?  Difficulty: 700Level, Divisibility/Multiples/Factors  90  How many subordinates does Marcia have?  Difficulty: 700Level, Combinations  91  R is a convex polygon. Does R have at least 8 sides?  Difficulty: 700Level, Geometry  92  If a, b and c are distinct positive integers, what is the value of (a  Difficulty: 700Level, Exponents/Powers, Source: Other  Please specify  93  Each block from bin A is 4 inches tall, while each block from bin B is  Difficulty: 700Level, Algebra, Arithmetic, Min/Max Problems, Source: Other  Please specify  94  A certain salesman's yearly income is determined by a base salary plus  Difficulty: 700Level, 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: 700Level, Divisibility/Multiples/Factors, Number Properties, Source: GMAT Club Tests  96  If x and y are nonzero integers, is (x^(1) + y^(1))^(1) >  Difficulty: 700Level, 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: 700Level, 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: 700Level, Algebra  99  A circle is drawn on a coordinate plane. If a line is drawn  Difficulty: 700Level, Geometry, Source: Manhattan GMAT  100  In the figure above, SQRE is a square, AB = AC, and AS = AQ.  Difficulty: 700Level, 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.




Math Expert
Joined: 02 Sep 2009
Posts: 53069

Re: 100 Hardest and easiest questions for DS
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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: Sub600 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: Sub600 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: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2019  4  If a certain vase contains only roses and tulips, how many tulips are  Difficulty: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2019  5  In College X the number of students enrolled in both a  Difficulty: Sub600 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: Sub600 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: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2019  8  How many basic units of currency X are equivalent to 250 basi  Difficulty: Sub600 Level, Arithmetic, Source: Official Guide, Source: OG 2019  9  The research funds of a certain company were divided among three depar  Difficulty: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2019  10  If sequence S has 120 terms, what is the 105th term of S?  Difficulty: Sub600 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: Sub600 Level, Arithmetic, Functions and Custom Characters, Source: GMAT Hacks  12  The figure above represents a circle graph of Company H's total expens  Difficulty: Sub600 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: Sub600 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: Sub600 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: Sub600 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 xyplane above, is angle QPR a right angle?  Difficulty: Sub600 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: Sub600 Level, Sequences, Source: Other  Please specify  18  Is x = 1/y?  Difficulty: Sub600 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: Sub600 Level, Number Properties, Source: GMAT Prep  20  If p, q, x, y, and z are different positive integers, which  Difficulty: Sub600 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: Sub600 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: Sub600 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: Sub600 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: Sub600 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: Sub600 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 onehour meeting on T  Difficulty: Sub600 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: Sub600 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: Sub600 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: Sub600 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: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2019  31  Is x < y?  Difficulty: Sub600 Level, Inequalities, Source: Official Guide, Source: Quant Review 2nd  32  For the system of equations given, what is the value of z?  Difficulty: Sub600 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: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2019  34  Is x between 0 and 1?  Difficulty: Sub600 Level, Inequalities, Source: GMAT Prep, Source: Quant Review 2019  35  What is the value of r/2 + s/2 ?  Difficulty: Sub600 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: Sub600 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: Sub600 Level, Arithmetic, Percent and Interest Problems, Source: Manhattan GMAT  38  What is the value of n in the list above?  Difficulty: Sub600 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: Sub600 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: Sub600 Level, Number Properties, Word Problems, Source: GMAT Prep  41  Does 2x + 8 = 12 ? (1) 2x + 10 = 14 (2) 3x + 8 = 14  Difficulty: Sub600 Level, Algebra, Source: Official Guide, Source: Quant Review 2019  42  Machine R and machine S work at their respective constant rates. How  Difficulty: Sub600 Level, Work/Rate Problems, Source: Official Guide, Source: OG 2019  43  If n is an integer, is n + 1 odd?  Difficulty: Sub600 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: Sub600 Level, Number Properties, Source: GMAT Prep EP 1  45  A garden store purchased a number of shovels and a number of  Difficulty: Sub600 Level, Word Problems  46  The number of seats in the first row of an auditorium is 18  Difficulty: Sub600 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: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2019  48  What is the retail price of a certain calculator? (1) The retail pri  Difficulty: Sub600 Level, Arithmetic, Source: Manhattan GMAT  49  What is the greatest integer that is less than t?  Difficulty: Sub600 Level, Number Properties, Source: GMAT Prep  50  A circular pizza is cut into eight wedgeshaped slices of  Difficulty: Sub600 Level, Geometry, Source: Manhattan GMAT  51  For all x, the expression x* is defined to be ax + a, where a is......  Difficulty: Sub600 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=33q (2) 5w +5q = 5  Difficulty: Sub600 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: Sub600 Level, Sequences, Source: OG 12  54  What is the value of x^3?  Difficulty: Sub600 Level, Absolute Values/Modulus, Algebra, Source: Veritas Prep  55  Square ABCD is inscribed in circle O. What is the area of square regio  Difficulty: Sub600 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: Sub600 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: Sub600 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: Sub600 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: Sub600 Level, Word Problems, Source: Official Guide, Source: OG 2019  60  If x and y are integers, what is the value of y ?  Difficulty: Sub600 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: Sub600 Level, Fractions/Ratios/Decimals, Source: Math Revolution  62  What is the value of t?  Difficulty: Sub600 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: Sub600 Level, Coordinate Geometry, Source: GMAT Prep  64  The cost of 10 pounds of apples and 2 pounds of grapes was $1  Difficulty: Sub600 Level, Algebra, Source: Official Guide, Source: OG 2019  65  Does nm =40? (1) 10/n = m/4 (2) 5n = 20 and 8m = 80  Difficulty: Sub600 Level, Algebra, Source: GMAT Paper Tests  66  Is 2x > 2y ?  Difficulty: Sub600 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: Sub600 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: Sub600 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: Sub600 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: Sub600 Level, Geometry, Source: Official Guide [Pre2000], Source: OG 1988  71  In the terminating decimal equivalent of d, what is the number of nonz  Difficulty: Sub600 Level, Fractions/Ratios/Decimals, Number Properties, Source: Other  Please specify  72  What is the volume of a certain cube?  Difficulty: Sub600 Level, Geometry, Source: GMAT Prep  73  What is the volume of the cube above?  Difficulty: Sub600 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: Sub600 Level, Work/Rate Problems  75  Q is a cube. Find the volume of the cube.  Difficulty: Sub600 Level, Geometry, Source: Magoosh  76  What is the value of ab + bc ? (1) b = 5 (2) a + c = 8  Difficulty: Sub600 Level, Algebra, Source: Grockit  77  If x and y are integers, what is the value of x+y?  Difficulty: Sub600 Level, Arithmetic, Inequalities, Source: GMAT Prep  78  If x is positive, what is the value of y ?  Difficulty: Sub600 Level, Algebra, Source: GMAT Prep  79  Three hoses, x, y, and z, each pump water at a constant rate into a 70  Difficulty: Sub600 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: Sub600 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: Sub600 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: Sub600 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: Sub600 Level, Distance/Rate Problems, Source: Manhattan GMAT  84  A circular tub has a band painted around its circumference  Difficulty: Sub600 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: Sub600 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: Sub600 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: Sub600 Level, Number Properties, Source: GMAT Prep  88  How many different 5person teams can be formed from a group  Difficulty: Sub600 Level, Combinations  89  Is m>k? (1) 3m>3k (2) 2m>2k  Difficulty: Sub600 Level, Inequalities, Source: GMAT Prep  90  If Sara's age is exactly twice Bill's age, what is Sara's ag  Difficulty: Sub600 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: Sub600 Level, Geometry  92  What is the value of x? (1) x = 4. (2) x^2 = 16.  Difficulty: Sub600 Level, Absolute Values/Modulus, Algebra, Source: GMAT Prep EP 1  93  What is the value of a − b ?  Difficulty: Sub600 Level, Algebra, Source: Princeton Review  94  What is the value of xy ?  Difficulty: Sub600 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: Sub600 Level, Algebra, Source: Official Guide, Source: OG 2019  96  If i and j are integers, is i + j an even integer?  Difficulty: Sub600 Level, Number Properties, Source: Official Guide, Source: OG 2016, Source: OG 2015, Source: OG 12, Source: OG 11  97  On a companysponsored cruise, 2/3 of the passengers were  Difficulty: Sub600 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: Sub600 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: Sub600 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: Sub600 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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Re: 100 Hardest and easiest questions for DS
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21 Aug 2015, 04:20



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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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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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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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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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24 Aug 2017, 20:58



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29 Jan 2018, 22:02
Hi Bunuel This is extremely helpful, many thanks



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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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30 May 2018, 21:47




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