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Joined: 02 Sep 2009
Posts: 46207

150 Hardest and easiest questions for DS [#permalink]
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21 Aug 2015, 03:42
150 Hardest Data Sufficiency Questions (May 1st, 2018  Jun 1st, 2018) Are you familiar with the GMAT Club's timer?We have pulled timer results from our database and analyzed every question in the forum. Based on those results, we have compiled a list of the hardest questions in each of the question forums we have. Below I am presenting to you the top 150 questions from DS forum. Data Sufficiency (DS)  Rank  Title  Topics  1  Train A leaves New York for Boston at 3 PM and travels at  Difficulty: 700Level, Distance/Rate Problems  2  In the correctly worked addition problem above, A, B, C, D  Difficulty: 700Level, Arithmetic, Number Properties, Source: Manhattan GMAT  3  What is the perimeter of PQRS ? (1) x = 30 degree  Difficulty: 700Level, Geometry  4  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  5  A car dealership carries only sedans and SUVs  Difficulty: 700Level, Percent and Interest Problems, Word Problems, Source: Veritas Prep  6  If k is an integer and x(x – k) = k + 1, what is the value of x?  Difficulty: 700Level, Algebra, Source: Other  Please specify  7  n and k are positive integers. When n is divided by 23, the quotient i  Difficulty: 700Level, Remainders, Source: GMATPrepNow  8  If, in the addition problem above, a, b, c, d, e, f, x, y, a  Difficulty: 700Level, Arithmetic  9  If n is a prime number greater than 2, is 1/x > 1?  Difficulty: 700Level, Inequalities, Source: Manhattan GMAT  10  Right triangle ABO is drawn in the xyplane, with OB as hypo  Difficulty: 700Level, Geometry, Source: Manhattan GMAT  11  Abe, Beth, Carl and Duncan are four siblings, among which Abe and Carl  Difficulty: 700Level, Number Properties, Source: eGMAT  12  The cost of 3 chocolates, 5 biscuits, and 5 ice creams is  Difficulty: 700Level, Word Problems  13  Math Revolution and GMAT Club Contest! There is a sequence, 4(10^n),  Difficulty: 700Level, Number Properties, Sequences, Source: Manhattan GMAT, Source: Math Revolution  14  For integers a and b, if (a^3 a^2 b)^1/2 = 7, what is the  Difficulty: 700Level, Algebra  15  When 120 is divided by positive singledigit integer m the remainder  Difficulty: 700Level, Absolute Values/Modulus, Divisibility/Multiples/Factors, Source: Other  Please specify  16  The average (arithmetic mean) of 5 distinct, single digit integers is  Difficulty: 700Level, Number Properties, Source: Princeton Review  17  P and Q are prime numbers less than 70. What is the units digit of P*Q  Difficulty: 700Level, Number Properties, Source: eGMAT  18  Julian bought 6 kilograms of cheese from each of Deli A and Deli B. At  Difficulty: 700Level, Word Problems, Source: 800 Score  19  If 20 Swiss Francs is enough to buy 9 notebooks and 3  Difficulty: 700Level, Inequalities, Word Problems  20  What is b in the circle shown above?  Difficulty: 700Level, Geometry, Source: Other  Please specify  21  If x, y and z are positive integers such that x^4*y^3 = z^2  Difficulty: 700Level, Number Properties, Source: eGMAT  22  The Range of Set A is R. A number having equal value to R  Difficulty: 700Level, Statistics and Sets Problems  23  If h and k are both positive integers, are both roots of the equation  Difficulty: 700Level, Algebra  24  The numbers D, N, and P are positive integers, such that D < N, and N  Difficulty: 700Level, Exponents/Powers, Number Properties, Source: Magoosh  25  If x is a positive integer less than 100 such that x is  Difficulty: 700Level, Algebra, Exponents/Powers, Source: eGMAT  26  w, x, y, and z are integers. If z > y > x > w, is w > x^2  Difficulty: 700Level, Absolute Values/Modulus, Inequalities, Source: Kaplan  27  Is a  3b an even number?  Difficulty: 700Level, Number Properties  28  At a restaurant, a group of friends ordered four main dishes  Difficulty: 700Level, Min/Max Problems, Source: Manhattan GMAT  29  In the picture, quadrilateral ABCD is a parallelogram and  Difficulty: 700Level, Geometry  30  A cube is made up of equal smaller cubes. Two of the sides  Difficulty: 700Level, Geometry  31  W, X, Y, and Z represent distinct digits such that WX * YZ = 1995. Wha  Difficulty: 700Level, Number Properties, Source: Veritas Prep  32  A natural number p, when divided by a certain divisor q, gives  Difficulty: 700Level, Number Properties, Remainders, Source: Jamboree  33  If a, b, and c are positive integers such that 1/a + 1/b = 1  Difficulty: 700Level, Fractions/Ratios/Decimals, Inequalities, Source: Manhattan GMAT  34  Three employees, A, B and C, clean a certain conference room each day.  Difficulty: 700Level, Work/Rate Problems, Source: Other  Please specify  35  Is 1/(xy) < y  x  Difficulty: 700Level, Inequalities  36  Students in a class are arranged to form groups of 4 members each  Difficulty: 700Level, Remainders, Source: Veritas Prep  37  A newer machine, working alone at its constant rate  Difficulty: 700Level, Work/Rate Problems, Source: Veritas Prep  38  If x, y, and z are integers, and x < y < z, is z y = y  Difficulty: 700Level, Statistics and Sets Problems, Source: Manhattan GMAT  39  In a group of 80 college students, how many own a car?  Difficulty: 700Level, Overlapping Sets, Source: Magoosh  40  How many prime factors does positive integer n have?  Difficulty: 700Level, Number Properties, Source: Veritas Prep  41  A certain ride has 60 people standing in line awaiting admission. If  Difficulty: 700Level, Overlapping Sets, Source: Other  Please specify  42  Between 1980 and 1985, Pierre’s investment portfolio increas  Difficulty: 700Level, Percent and Interest Problems, Source: Princeton Review  43  Is x^3  6x^2 + 11x  6 < 0  Difficulty: 700Level, Inequalities  44  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  45  In the correctlyworked multiplication problem above, each symbol repr  Difficulty: 700Level, Arithmetic, Number Properties, Source: Veritas Prep  46  If a, b, and c are integers such that 0 < a < b < c < 10, is  Difficulty: 700Level, Divisibility/Multiples/Factors, Source: Manhattan GMAT  47  If x is positive, what is the value of x – 3 – 2x – 4 +  Difficulty: 700Level, Absolute Values/Modulus, Inequalities, Source: Manhattan GMAT  48  Is 2a − 3b < a − b + a − 2b  Difficulty: 700Level, Absolute Values/Modulus  49  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  50  The area of a rectangle is 28 square centimeter. What is the perimeter  Difficulty: 700Level, Algebra, Geometry  51  Is y^2 + 7y + xy even?  Difficulty: 700Level, Divisibility/Multiples/Factors, Number Properties  52  If a and b are twodigit positive integers greater than 10  Difficulty: 700Level, Remainders, Source: GMAT Club Tests  53  A set of positive integers contains twice as many even integers as odd  Difficulty: 700Level, Divisibility/Multiples/Factors, Number Properties, Probability  54  Reiko drove from point A to point B at a constant speed, and  Difficulty: 700Level, Distance/Rate Problems, Source: Manhattan GMAT  55  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  56  If a, b, x, y are positive integers and a^xb^y= 144, then a + b = ?  Difficulty: 700Level, Algebra, Exponents/Powers, Source: Math Revolution  57  If n >2 and n^45n^2+4 = 20h, Is h an integer ?  Difficulty: 700Level, Algebra, Arithmetic, Source: Other  Please specify  58  In the xycoordinate plane, line L passes through the points (b, a) an  Difficulty: 700Level, Coordinate Geometry, Source: Manhattan GMAT  59  X is a threedigit positive integer in which each digit is either 1 or  Difficulty: 700Level, Fractions/Ratios/Decimals, Remainders, Source: Manhattan GMAT  60  Is the exact value of x/y less than 0.5?  Difficulty: 700Level, Fractions/Ratios/Decimals, Source: Economist GMAT Tutor  61  A committee of 2 people is to be formed from a group of 8  Difficulty: 700Level, Probability  62  If x and y are negative numbers, is x<y?  Difficulty: 700Level, Inequalities, Source: GMAT Club Tests  63  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  64  The number of elements in set K is an odd number. The minimum value of  Difficulty: 700Level, Statistics and Sets Problems, Source: Math Revolution  65  If a, b and c are distinct positive integers, what is the value of (a  Difficulty: 700Level, Exponents/Powers, Source: Other  Please specify  66  R is a convex polygon. Does R have at least 8 sides?  Difficulty: 700Level, Geometry  67  x, y are positive integers. Find the number of even factors of 4x^2  Difficulty: 700Level, Divisibility/Multiples/Factors, Source: eGMAT  68  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  69  If a and b are both positive integers, is b^(a+1)  ba^b odd?  Difficulty: 700Level, Algebra, Number Properties, Source: Manhattan GMAT  70  Is A + B + C even?  Difficulty: 700Level, Number Properties, Source: GMAT Club Tests  71  Points A, B, C and D lie on a circle of radius 1. Let x be  Difficulty: 700Level, Geometry  72  If 6xy = x^2*y + 9y, what is the value of xy?  Difficulty: 700Level, Algebra, Source: Manhattan GMAT  73  If N is a positive threedigit number that is greater than 2  Difficulty: 700Level, Fractions/Ratios/Decimals, Number Properties, Source: Manhattan GMAT  74  Set X consists of 9 positive elements. Set Y consists of the  Difficulty: 700Level, Statistics and Sets Problems  75  How many subordinates does Marcia have?  Difficulty: 700Level, Combinations  76  At a particular store, candy bars are normally priced at $1.  Difficulty: 700Level, Word Problems, Source: Manhattan GMAT  77  If 5a=9b=15c, what is the value of a+b+c?  Difficulty: 700Level, Algebra  78  A dental licensure exam requires a 75% minimum score in orde  Difficulty: 700Level, Fractions/Ratios/Decimals, Word Problems, Source: Veritas Prep  79  In a sequence of 13 consecutive integers, all of which are  Difficulty: 700Level, Divisibility/Multiples/Factors, Sequences  80  A certain salesman's yearly income is determined by a base salary plus  Difficulty: 700Level, Percent and Interest Problems, Word Problems, Source: Manhattan GMAT  81  a, b, and c are three integers such that a and b are less than 100, an  Difficulty: 700Level, Number Properties, Sequences  82  A certain floor of an office building has 1,200 square feet of floor  Difficulty: 700Level, Geometry  83  If x and y are nonzero integers, is (x^(1) + y^(1))^(1) >  Difficulty: 700Level, Exponents/Powers, Inequalities, Source: Manhattan GMAT  84  If a, b and n are positive integers such that n = 3a – b3  Difficulty: 700Level, Number Properties, Source: eGMAT  85  Four friends go to Macy’s for shopping and buy a top each. Three of th  Difficulty: 700Level, Word Problems, Source: Veritas Prep  86  A circle is drawn on a coordinate plane. If a line is drawn  Difficulty: 700Level, Geometry, Source: Manhattan GMAT  87  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  88  In the figure above, SQRE is a square, AB = AC, and AS = AQ.  Difficulty: 700Level, Geometry, Source: Manhattan GMAT  89  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  90  In the xycoordinate plane, line A is defined by the equation j*xy=7  Difficulty: 700Level, Coordinate Geometry, Source: GMAT Prep  91  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  92  A certain fruit stand sells only apples for $0.26 each, bananas for $0  Difficulty: 700Level, Word Problems, Source: Veritas Prep  93  In the trapezoid above, with sides a, b, c, and 1, what is the value o  Difficulty: 700Level, Geometry, Source: Manhattan GMAT  94  Is the integer 2b divisible by 6 ?  Difficulty: 700Level, Divisibility/Multiples/Factors  95  If m, n, and p are threedigit integers and m + n = p  Difficulty: 700Level, Number Properties, Source: Manhattan GMAT  96  If xy 0, is x > y? (1) 4x = 3y (2) y  x = x  y  Difficulty: 700Level, Absolute Values/Modulus, Inequalities  97  A rectangle is plotted on the standard coordinate plane  Difficulty: 700Level, Coordinate Geometry, Source: Grockit  98  If x, y, and z are positive integers, and (x!+x)/z=y, then  Difficulty: 700Level, Algebra, Divisibility/Multiples/Factors, Number Properties  99  When 3digit integer 6a3 plus 3digit integer 3b5 is divisible by 9, i  Difficulty: 700Level, Divisibility/Multiples/Factors, Source: Math Revolution  100  What is the value of y?  Difficulty: 700Level, Algebra, Arithmetic, Roots, Source: Magoosh  101  Is n/18 an integer?  Difficulty: 700Level, Divisibility/Multiples/Factors, Number Properties, Source: Manhattan GMAT  102  8 schools sent a total of 96 students to a math club competition, with  Difficulty: 700Level, Min/Max Problems, Source: Veritas Prep  103  In the sequence a1,a2,…,an,…,a1=x and an=y–zan−1 for all n>1. Is a3>a2  Difficulty: 700Level, Sequences, Source: Veritas Prep  104  ax + by=10, ay + bx=12. which one is greater here, x or y ?  Difficulty: 700Level, Inequalities  105  A drawer contains 6 socks. If two socks are randomly  Difficulty: 700Level, Probability, Source: GMATPrepNow  106  If x and y are positive integers, what is the value of x?  Difficulty: 700Level, Remainders, Source: GMATPrepNow  107  Is xy<0 ? (1) x^3*y^5/x*y^2 <0 (2) xy<xy  Difficulty: 700Level, Absolute Values/Modulus, Inequalities  108  A certain diet program calls for eating daily calories from  Difficulty: 700Level, Word Problems, Source: GMAT Paper Tests  109  When a positive integer 'x' is divided by a divisor 'd', the remainder  Difficulty: 700Level, Divisibility/Multiples/Factors, Remainders, Source: Other  Please specify  110  In the morning, Chris drives from Toronto to Oakville and in the eveni  Difficulty: 700Level, Distance/Rate Problems, Source: Veritas Prep  111  Superfast train A leaves Newcastle for Birmingham at 3 PM and travels  Difficulty: 700Level, Distance/Rate Problems, Source: Veritas Prep  112  If a number N is decreased by p percent and then the resulting value  Difficulty: 700Level, Algebra, Source: Manhattan GMAT  113  Jeff is painting two murals on the front of an old apartment  Difficulty: 700Level, Geometry, Source: Manhattan GMAT  114  a, b, c, d, and e are five numbers such that a≤b≤c≤d≤e and e  Difficulty: 700Level, Statistics and Sets Problems, Source: Economist GMAT Tutor  115  Of all the attendees at a dinner party, 40% were women. If  Difficulty: 700Level, Overlapping Sets  116  If x is an integer, what is the value of x?  Difficulty: 700Level, Absolute Values/Modulus, Source: GMAT Pill  117  If 10^a * 3^b * 5^c = 450^n, what is the value of c?  Difficulty: 700Level, Number Properties, Source: Veritas Prep  118  Of the 5 numbers, the largest number is 4 greater than the median. Is  Difficulty: 700Level, Statistics and Sets Problems  119  If x, y, and z are positive integers, where x > y and z = √x  Difficulty: 700Level, Number Properties, Source: Kaplan  120  In triangle ABC (figure shown) drawn on a coordinate plane, A, B and C  Difficulty: 700Level, Coordinate Geometry, Source: Other  Please specify  121  In the table above is shown the percent reduction in the  Difficulty: 700Level, Percent and Interest Problems, Word Problems, Source: Princeton Review  122  If x, y, and z are positive integers such that x < y < z  Difficulty: 700Level, Divisibility/Multiples/Factors, Number Properties  123  For any integer n greater than 1, factorial denotes the product of all  Difficulty: 700Level, Number Properties, Source: eGMAT  124  Jane can paint the wall in J hours, and Bill can paint the  Difficulty: 700Level, Word Problems, Work/Rate Problems  125  If x/y > 2, is 3x + 2y < 18? (1) x  y is less than 2 (2) y  x is les  Difficulty: 700Level, Inequalities  126  In a certain company, 25% of the women and 17% of the men participate  Difficulty: 700Level, Word Problems, Source: Magoosh  127  A state legislator drafts an income tax proposal that imposes a tax of  Difficulty: 700Level, Arithmetic, Source: Princeton Review  128  w, x, y and z are positive integers. When w is divided by x, the quoti  Difficulty: 700Level, Divisibility/Multiples/Factors, Remainders, Source: GMATPrepNow  129  If a, b and c are integers such that b > a, is b+c > a  Difficulty: 700Level, Geometry, Inequalities  130  If n = x^5*y^7, where x and y are positive integers greater than 1  Difficulty: 700Level, Divisibility/Multiples/Factors, Number Properties, Source: GMAT Club Tests  131  If x and y are positive integers is y odd?  Difficulty: 700Level, Algebra, Number Properties, Source: Manhattan GMAT  132  A nonprofit group organizes its local fundraisers in teams,  Difficulty: 700Level, Word Problems, Source: Veritas Prep  133  If x and y are positive integers, is x a prime number?  Difficulty: 700Level, Absolute Values/Modulus, Algebra, Inequalities, Source: GMAT Club Tests  134  Two positive integers a and b are divisible by 5, which is their  Difficulty: 700Level, Number Properties, Source: eGMAT  135  If n is an integer greater than 1 is 3^n2^n divisible by 35  Difficulty: 700Level, Divisibility/Multiples/Factors, Exponents/Powers, Number Properties  136  Is x^2 + y^2 > 100?  Difficulty: 700Level, Algebra, Exponents/Powers, Source: Veritas Prep  137  A person inherited few gold coins from his father. If he  Difficulty: 700Level, Remainders, Word Problems  138  In the figure above, ABC is a right triangle with AC as its hypotenuse  Difficulty: 700Level, Geometry, Source: Manhattan GMAT  139  The average of a set of 7 integers equal 27. If the smallest number of  Difficulty: 700Level, Min/Max Problems, Source: Other  Please specify  140  If p, x, and y are positive integers, y is odd, and p = x^2  Difficulty: 700Level, Divisibility/Multiples/Factors, Number Properties, Remainders  141  In quadrilateral ABCD, sides AB and BC each have length √2,  Difficulty: 700Level, Geometry, Source: Manhattan GMAT  142  A set of nonnegative integers consists of {x, x + 7, 2x, y, y + 5}.  Difficulty: 700Level, Sequences  143  Which of the two values 10^(2) and 10^(3), is x more close  Difficulty: 700Level, Arithmetic, Exponents/Powers  144  Is product 2*x*5*y an even integer?  Difficulty: 700Level, Number Properties, Source: GMAT Club Tests  145  What is the value of  (x+5)/(x+7) ? (1) x2 + 7x – 18 = 0 (2) 3x2 + 4  Difficulty: 700Level, Absolute Values/Modulus, Algebra, Source: Other  Please specify  146  Two cars start moving simultaneously in different directions from poin  Difficulty: 700Level, Distance/Rate Problems, Source: Other  Please specify  147  If the original price of an item in a retail store is marked  Difficulty: 700Level, Percent and Interest Problems, Source: Manhattan GMAT  148  What is the probability of (x+3)(x+10) being div by 6?  Difficulty: 700Level, Divisibility/Multiples/Factors, Probability, Source: Other  Please specify  149  x is an integer and x raised to any odd integer is greater  Difficulty: 700Level, Algebra, Exponents/Powers, Source: Official Guide  150  If x and y are integers, does x^y * y^(x) = 1?  Difficulty: 700Level, Exponents/Powers, Inequalities 
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Re: 150 Hardest and easiest questions for DS [#permalink]
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21 Aug 2015, 03:43
150 Easiest Data Sufficiency Questions (May 1st, 2018  Jun 1st, 2018) Are you familiar with the GMAT Club's timer?We have pulled timer results from our database and analyzed every question in the forum. Based on those results, we have compiled a list of the easiest questions in each of the question forums we have. Below I am presenting to you the top 150 questions from DS forum. Data Sufficiency (DS)  Rank  Title  Topics  1  What is the value of 10 percent of y?  Difficulty: Sub600 Level, Percent and Interest Problems, Source: Official Guide  2  What is the value of x ?  Difficulty: Sub600 Level, Algebra, Source: Official Guide  3  In College X the number of students enrolled in both a  Difficulty: Sub600 Level, Overlapping Sets, Source: Official Guide  4  For which type of investment, J or K, is the annual rate of  Difficulty: Sub600 Level, Percent and Interest Problems, Source: Official Guide  5  What is the value of w^(−2)?  Difficulty: Sub600 Level, Exponents/Powers, Source: Official Guide  6  The figure above represents a circle graph of Company H's total expens  Difficulty: Sub600 Level, Geometry, Graphs and Illustrations, Source: Official Guide  7  In the xyplane above, is angle QPR a right angle?  Difficulty: Sub600 Level, Coordinate Geometry, Geometry, Source: Official Guide  8  If sequence S has 120 terms, what is the 105th term of S?  Difficulty: Sub600 Level, Sequences, Source: Official Guide  9  Is x = 1/y?  Difficulty: Sub600 Level, Algebra, Source: Official Guide  10  Is p^2 an odd integer?  Difficulty: Sub600 Level, Number Properties, Source: Official Guide  11  Carlotta can drive from her home to her office by one of two  Difficulty: Sub600 Level, Distance/Rate Problems, Source: Official Guide  12  Is x between 0 and 1?  Difficulty: Sub600 Level, Inequalities, Source: GMAT Prep  13  For the system of equations given, what is the value of z?  Difficulty: Sub600 Level, Algebra, Source: Official Guide  14  Hoses X and Y simultaneously fill an empty swimming pool tha  Difficulty: Sub600 Level, Work/Rate Problems, Source: Official Guide  15  Committee member W wants to schedule a onehour meeting on T  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  16  What is the value of r/2 + s/2 ?  Difficulty: Sub600 Level, Algebra, Arithmetic, Source: Official Guide  17  If p, q, x, y, and z are different positive integers, which  Difficulty: Sub600 Level, Statistics and Sets Problems, Source: Official Guide  18  What is the value of n in the list above?  Difficulty: Sub600 Level, Statistics and Sets Problems, Source: Official Guide  19  What is the value of xy?  Difficulty: Sub600 Level, Algebra, Source: Official Guide  20  What is the value of n?  Difficulty: Sub600 Level, Number Properties, Source: GMAT Prep  21  Is rw = 0?  Difficulty: Sub600 Level, Inequalities, Source: Official Guide  22  If sequence S has 100 terms, what is the 83rd term of S?  Difficulty: Sub600 Level, Sequences, Source: Other  Please specify  23  The symbol R represents one of the following  Difficulty: Sub600 Level, Arithmetic, Functions and Custom Characters, Source: GMAT Hacks  24  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  25  Is x < y?  Difficulty: Sub600 Level, Inequalities, Source: Official Guide  26  If n is an integer, is n + 1 odd?  Difficulty: Sub600 Level, Number Properties, Source: Official Guide  27  Each of the marbles in a jar is either red or white or blue. If one ma  Difficulty: Sub600 Level, Probability, Source: Official Guide  28  The number of seats in the first row of an auditorium is 18  Difficulty: Sub600 Level, Sequences, Source: Official Guide  29  What is the value of z in the triangle above?  Difficulty: Sub600 Level, Geometry, Source: Official Guide  30  What is the value of x ?  Difficulty: Sub600 Level, Algebra, Source: Official Guide  31  Is x < y? (1) z < y (2) z < x  Difficulty: Sub600 Level, Inequalities, Source: GMAT Paper Tests, Source: Official Guide  32  How many people in a group of 50 own neither a fax machine nor a laser  Difficulty: Sub600 Level, Overlapping Sets, Source: Official Guide  33  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  34  A garden store purchased a number of shovels and a number of  Difficulty: Sub600 Level, Word Problems  35  What is the value of w + q ? (1) 3w=33q (2) 5w +5q = 5  Difficulty: Sub600 Level, Algebra, Source: Official Guide  36  What is the tenths digit of the number d when it is written as a......  Difficulty: Sub600 Level, Fractions/Ratios/Decimals, Source: Official Guide  37  A circular pizza is cut into eight wedgeshaped slices of  Difficulty: Sub600 Level, Geometry, Source: Manhattan GMAT  38  If sequence S has 200 terms, what is the 192nd term of S  Difficulty: Sub600 Level, Sequences, Source: Official Guide  39  What is the product of v, w, and x?  Difficulty: Sub600 Level, Number Properties, Source: GMAT Prep EP 1  40  Square ABCD is inscribed in circle O. What is the area of square regio  Difficulty: Sub600 Level, Geometry, Source: Official Guide  41  If p and q are positive, is p/q less than 1?  Difficulty: Sub600 Level, Inequalities, Source: Official Guide  42  Is x a negative number?  Difficulty: Sub600 Level, Inequalities, Source: Official Guide  43  Water is pumped into a partially filled tank at a constant  Difficulty: Sub600 Level, Work/Rate Problems, Source: Official Guide  44  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  45  If x and y are integers, what is the value of y ?  Difficulty: Sub600 Level, Algebra, Source: Official Guide  46  In the figure above, what is the value of z?  Difficulty: Sub600 Level, Geometry, Source: Official Guide  47  What is the greatest integer that is less than t?  Difficulty: Sub600 Level, Number Properties, Source: GMAT Prep  48  What were the gross revenues from ticket sales for a certain  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  49  What was the range of the selling prices of the 30 wallets sold by a  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  50  Does nm = 40?  Difficulty: Sub600 Level, Algebra, Source: GMAT Paper Tests  51  How many of the students in a certain class are taking both a history  Difficulty: Sub600 Level, Number Properties, Word Problems, Source: GMAT Prep  52  What is the value of t?  Difficulty: Sub600 Level, Algebra, Source: Official Guide  53  Is w + h 4 positive? 1) h is positive 2) w is positive  Difficulty: Sub600 Level, Number Properties, Source: Official Guide  54  What is the value of x^3?  Difficulty: Sub600 Level, Absolute Values/Modulus, Algebra, Source: Veritas Prep  55  A circular tub has a band painted around its circumference  Difficulty: Sub600 Level, Geometry, Source: Official Guide  56  Is the product of a certain pair of integers even?  Difficulty: Sub600 Level, Number Properties, Source: GMAT Prep  57  What is the retail price of a certain calculator? (1) The retail pri  Difficulty: Sub600 Level, Arithmetic, Source: Manhattan GMAT  58  In a random sample of 80 adults, how many are college  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  59  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  60  Is 2x > 2y ?  Difficulty: Sub600 Level, Inequalities, Source: Official Guide  61  If Sara's age is exactly twice Bill's age, what is Sara's ag  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  62  Machine X runs at a constant rate and produces a lot consist  Difficulty: Sub600 Level, Work/Rate Problems, Source: Official Guide  63  If on a fishing trip Jim and Tom each caught some fish, which one  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  64  How many different 5person teams can be formed from a group  Difficulty: Sub600 Level, Combinations  65  In PQR, if PQ = x, QR = x + 2, and PR = y, which of the  Difficulty: Sub600 Level, Geometry, Source: Official Guide  66  If i and j are integers, is i + j an even integer?  Difficulty: Sub600 Level, Number Properties, Source: Official Guide  67  On a companysponsored cruise, 2/3 of the passengers were  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  68  What is the measure of angle YQZ in the figure?  Difficulty: Sub600 Level, Geometry, Source: Grockit  69  What is the radius of the circle above with center O?  Difficulty: Sub600 Level, Geometry, Source: Official Guide  70  If x and y are integers, what is the value of x+y?  Difficulty: Sub600 Level, Arithmetic, Inequalities, Source: GMAT Prep  71  What is the value of x – y ?  Difficulty: Sub600 Level, Algebra, Source: Princeton Review  72  The length of the edging that surrounds circular garden K is  Difficulty: Sub600 Level, Geometry, Source: Official Guide  73  What amount did Jean earn from the commission on her sales  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  74  What is the volume of a certain cube?  Difficulty: Sub600 Level, Geometry  75  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  76  What is the value of ab + bc ? (1) b = 5 (2) a + c = 8  Difficulty: Sub600 Level, Algebra, Source: Grockit  77  What was Bill's average speed on his trip of 250 miles from New York  Difficulty: Sub600 Level, Distance/Rate Problems, Source: Manhattan GMAT  78  If machine X ran continuously at a uniform rate to fill  Difficulty: Sub600 Level, Work/Rate Problems  79  What is the value of a − b ?  Difficulty: Sub600 Level, Algebra, Source: Princeton Review  80  What is the cube root of w?  Difficulty: Sub600 Level, Roots, Source: Official Guide  81  In PQR, if PQ = x, QR = x + 2, and PR = y, which of the  Difficulty: Sub600 Level, Geometry, Source: Official Guide  82  If the sequence S has 300 terms, what is the 293rd term of S  Difficulty: Sub600 Level, Sequences, Source: Official Guide  83  If the Longfellow Playground is rectangular, what is its width?  Difficulty: Sub600 Level, Geometry, Source: Other  Please specify  84  How long would it take Sue to paint the room?  Difficulty: Sub600 Level, Work/Rate Problems, Source: Other  Please specify  85  Bob purchased 18 cans of soda, some of which contained diet soda. How  Difficulty: Sub600 Level, Word Problems, Source: Princeton Review  86  What is the volume of the cube above?  Difficulty: Sub600 Level, Geometry, Source: Official Guide  87  The perimeter of a rectangular garden is 360 feet. What is t  Difficulty: Sub600 Level, Geometry, Source: Official Guide  88  What is the volume of a certain cube?  Difficulty: Sub600 Level, Geometry, Source: GMAT Prep  89  What is the average (arithmetic mean) of j and k ?  Difficulty: Sub600 Level, Statistics and Sets Problems, Source: Official Guide  90  Machines X and Y run simultaneously at their respective  Difficulty: Sub600 Level, Work/Rate Problems  91  Is z less than 0?  Difficulty: Sub600 Level, Inequalities, Source: Official Guide  92  How many newspapers were sold at a certain newsstand today?  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  93  Q is a cube. Find the volume of the cube.  Difficulty: Sub600 Level, Geometry, Source: Magoosh  94  In Mr. Smith's class, what is the ratio of the number of boy  Difficulty: Sub600 Level, Fractions/Ratios/Decimals, Source: Official Guide  95  What is the value of x^2  y^2 ?  Difficulty: Sub600 Level, Algebra, Source: Official Guide  96  If n is a positive integer, is n odd?  Difficulty: Sub600 Level, Number Properties, Source: Official Guide  97  In the month of June, a street vendor sold 10% more hot dogs than he  Difficulty: Sub600 Level, Percent and Interest Problems, Source: Other  Please specify  98  Is a even?  Difficulty: Sub600 Level, Number Properties  99  A certain investment earned a fixed rate of 4 percent interest per yea  Difficulty: Sub600 Level, Percent and Interest Problems, Source: Official Guide  100  How many different carpool possibilities exist for 12 coworkers from  Difficulty: Sub600 Level, Combinations, Source: Other  Please specify  101  If S = {2, 3, x, y}, what is the value of x + y?  Difficulty: Sub600 Level, Number Properties  102  If the two floors in a certain building are 9 feet apart  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  103  If a certain animated cartoon consists of a total of 17,280  Difficulty: Sub600 Level, Distance/Rate Problems, Source: Official Guide  104  What is the value of xy ?  Difficulty: Sub600 Level, Algebra, Source: GMAT Hacks  105  John took a test that had 60 questions numbered from 1 to 60  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  106  If w+ z = 28, what is the value of wz?  Difficulty: Sub600 Level, Algebra, Arithmetic, Source: Official Guide  107  Elena receives a salary plus a commission that is equal to a  Difficulty: Sub600 Level, Percent and Interest Problems, Source: Official Guide  108  Who types at a faster rate, John or Bob?  Difficulty: Sub600 Level, Work/Rate Problems, Source: Economist GMAT Tutor  109  In the figure above, segments PQ and PR are each parallel to one of th  Difficulty: Sub600 Level, Coordinate Geometry, Source: GMAT Prep  110  If t denotes the thousandths digit in the decimal  Difficulty: Sub600 Level, Arithmetic, Fractions/Ratios/Decimals, Source: Official Guide  111  The total amount that John paid at a certain restaurant  Difficulty: Sub600 Level, Percent and Interest Problems, Source: GMAT Prep QP1  112  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  113  What was the amount of money donated to a certain charity?  Difficulty: Sub600 Level, Arithmetic, Percent and Interest Problems, Source: Official Guide  114  If x ≠ 0, what is the value of (x^p/x^q)^4 ?  Difficulty: Sub600 Level, Algebra, Exponents/Powers, Source: Official Guide  115  If r and s are integers, is r divisible by 7?  Difficulty: Sub600 Level, Divisibility/Multiples/Factors, Number Properties  116  On Sunday morning, a printing press printed its newspapers at a consta  Difficulty: Sub600 Level, Work/Rate Problems, Source: Manhattan GMAT  117  Point (x, y) has in which quadrant of the rectangular coordinate syste  Difficulty: Sub600 Level, Coordinate Geometry, Source: Other  Please specify  118  In a certain factory, hours worked by each employee in excess of 40...  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  119  If l and w represent the length and width, respectively, of  Difficulty: Sub600 Level, Geometry, Source: Official Guide  120  A thoroughly blended biscuit mix includes only flour and bak  Difficulty: Sub600 Level, Mixture Problems  121  If a is a 3digit integer and b is a 3digit integer, is the units  Difficulty: Sub600 Level, Fractions/Ratios/Decimals, Inequalities, Number Properties, Source: Official Guide  122  On May 1 of last year, Jasmin invested x dollars in a new  Difficulty: Sub600 Level, Percent and Interest Problems, Source: GMAT Prep QP1  123  Three houses are being sold through a real estate agent  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  124  A citrus fruit grower receives $15 for each crate of oranges  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  125  What is the value of the integer p ?  Difficulty: Sub600 Level, Divisibility/Multiples/Factors, Number Properties, Source: Official Guide  126  If A and B are positive integers, is the product AB even?  Difficulty: Sub600 Level, Number Properties, Source: Official Guide  127  What is the value of b + c ?  Difficulty: Sub600 Level, Algebra, Source: Official Guide  128  Is ax = 3  bx? (1) x(a + b) = 3 (2) a = b = 1.5 and x = 1  Difficulty: Sub600 Level, Algebra, Source: Official Guide  129  For all integers k, the function g is defined by g(k) = ak+4, where a  Difficulty: Sub600 Level, Functions and Custom Characters, Source: Math Revolution  130  Does the decimal equivalent of P/Q, where P and Q are  Difficulty: Sub600 Level, Fractions/Ratios/Decimals  131  What percent of a group of people are women with red hair?  Difficulty: Sub600 Level, Overlapping Sets, Source: Official Guide  132  In the triangle above, does a^2 + b^2 = c^2 ?  Difficulty: Sub600 Level, Geometry, Source: Official Guide  133  What is the average (arithmetic mean) of the first 90 measurements  Difficulty: Sub600 Level, Statistics and Sets Problems, Source: GMAT Prep EP 1  134  A jar contains 30 marbles, of which 20 are red and 10 are bl  Difficulty: Sub600 Level, Probability, Source: Official Guide  135  Marcia's bucket can hold a maximum of how many liters of wat  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  136  If m/n = 5/3, what is the value of m + n ?  Difficulty: Sub600 Level, Algebra, Source: Official Guide  137  What is the area of square ABCD?  Difficulty: Sub600 Level, Geometry, Source: Veritas Prep  138  If u, v, and w are integers, is u > 0 ?  Difficulty: Sub600 Level, Algebra, Source: GMAT Prep  139  What is the remainder when the positive integer n is divided  Difficulty: Sub600 Level, Remainders, Source: GMAT Prep  140  If P and Q are each circular regions, what is the radius of  Difficulty: Sub600 Level, Geometry, Source: Official Guide  141  If the ratio of a to b is 4 to 3 and the ratio of b to c is 1 to 5..  Difficulty: Sub600 Level, Fractions/Ratios/Decimals, Source: Kaplan  142  If Pat saved $600 of his earnings last month, how much did  Difficulty: Sub600 Level, Word Problems, Source: Official Guide  143  If x is an integer, is xx<2^x ?  Difficulty: Sub600 Level, Absolute Values/Modulus, Algebra, Inequalities, Source: Official Guide  144  If d is a positive integer, is d^1/2 an integer?  Difficulty: Sub600 Level, Number Properties, Source: Official Guide  145  Cyclist A leaves point X at 12 noon and travels at constant velocity  Difficulty: Sub600 Level, Work/Rate Problems, Source: Other  Please specify  146  What is the average (arithmetic mean) of x and y?  Difficulty: Sub600 Level, Statistics and Sets Problems, Source: Official Guide  147  xy=?  Difficulty: Sub600 Level, Absolute Values/Modulus, Algebra, Source: Math Revolution  148  If n is an integer, is n  1 even?  Difficulty: Sub600 Level, Number Properties, Source: Grockit  149  If none of the students are ambidextrous, what percentage of  Difficulty: Sub600 Level, Overlapping Sets, Source: Manhattan GMAT  150  At a certain restaurant, if each hamburger costs the same am  Difficulty: Sub600 Level, Word Problems, Source: GMAT Prep 
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Collection of Questions: PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.
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Re: 150 Hardest and easiest questions for DS [#permalink]
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21 Aug 2015, 05:20



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Re: 150 Hardest and easiest questions for DS [#permalink]
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07 Dec 2015, 09:09
is there a dump of all these questions rather than click each link?



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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.
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Re: 150 Hardest and easiest questions for DS [#permalink]
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29 Jun 2017, 21:57
Thanks Buñuel for your efforts.[WHITE SMILING FACE] Sent from my Moto G Play using GMAT Club Forum mobile app



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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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24 Aug 2017, 21:58



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



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



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30 May 2018, 22:47




Re: 150 Hardest and easiest questions for DS
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30 May 2018, 22:47






