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Joined: 02 Sep 2009
Posts: 49206

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



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Re: 150 Hardest and easiest questions for DS
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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
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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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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
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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
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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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Re: 150 Hardest and easiest questions for DS
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24 Aug 2017, 21:58



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



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17 Sep 2018, 17:30
Thanks for sharing




Re: 150 Hardest and easiest questions for DS &nbs
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17 Sep 2018, 17:30






