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



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09 Jun 2017, 07:33
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is there a dump of all these questions rather than click each link? Bunuel IF not can you please make one as Its very time consuming due to technical problem thanks!!



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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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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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