Best Of The Best Of 2019: QUANTITATIVE

The Hardest Problem Solving Questions Posted in 2019
In descending order.

987| https://gmatclub.com/forum/topic-290107.html |In an investigation, it was found that 20% of the employees who are vu
964| https://gmatclub.com/forum/topic-301053.html |Tap A can fill a tank in 10 hours, tap B can fill it in 20 hours, and,
964| https://gmatclub.com/forum/topic-309586.html |How many different pairs of positive integers (a, b) satisfy the equat
959| https://gmatclub.com/forum/topic-292454.html |Last year Isabella took 7 math tests and received 7 different scores,
940| https://gmatclub.com/forum/topic-292205.html |Let a, b, c, d, and e be positive integers with a + b + c + d + e = 20
932| https://gmatclub.com/forum/topic-287768.html |Question of the week - 34 (A, B and C are three distinct ............)
931| https://gmatclub.com/forum/topic-305915.html |If Whitney wrote the decimal representations for the first 300 positiv
918| https://gmatclub.com/forum/topic-291359.html |Cassandra sets her watch to the correct time at noon. At the actual ti
911| https://gmatclub.com/forum/topic-292239.html |What is the number of roots of the equation (x^2-5x+5)^{(x^2-5x-6)}=1?
908| https://gmatclub.com/forum/topic-294028.html |A square in the coordinate plane has vertices whose y-coordinates are
898| https://gmatclub.com/forum/topic-305853.html |Let n and k be positive integers with k n. From an n n array of do
888| https://gmatclub.com/forum/topic-295443.html |A quadrilateral is inscribed in a circle of radius 200*2^(1/2). Three
878| https://gmatclub.com/forum/topic-295572.html |If two integers are chosen at random out of first 5 positive integers,
877| https://gmatclub.com/forum/topic-312047.html |A point is randomly chosen inside the unit square ABCD such that angle
876| https://gmatclub.com/forum/topic-285661.html |Question of the week - 30 (A group of 4 persons is to be selected ...)
876| https://gmatclub.com/forum/topic-289596.html |An airline has two daily one-way flights operating from Istanbul
869| https://gmatclub.com/forum/topic-309596.html |The GDP of a country is $13.8 billion, and the total production of one
851| https://gmatclub.com/forum/topic-305873.html |The surface distance between 2 points on the surface of a cube is the
849| https://gmatclub.com/forum/topic-300011.html |If n is a positive integer less than 400, what is the number of n such
846| https://gmatclub.com/forum/topic-304475.html |Find the number of solutions of following equation-: ||x|-6|=2^x
845| https://gmatclub.com/forum/topic-289919.html |A painting 4.5 ft X 1.4 ft is to be bordered with a 3 inches wide wood
841| https://gmatclub.com/forum/topic-292202.html |Let n be the smallest positive integer such that n is divisible by 20,
840| https://gmatclub.com/forum/topic-291154.html |How many ordered pairs of real numbers (x,y) satisfy the following sys
836| https://gmatclub.com/forum/topic-290322.html |W, X, Y and Z are four different positive integers. When X
831| https://gmatclub.com/forum/topic-293196.html |Question of the Week - 43 (While working individually, each of A, B)

The Hardest Data Sufficiency Questions Posted in 2019
In descending order.

986| https://gmatclub.com/forum/topic-285518.html |If x and y are non zero numbers less than 1, is (y^4 x^4) > (y^3 x
934| https://gmatclub.com/forum/topic-305512.html |b, c, d, e, f and g are different positive integers. When b is divided
919| https://gmatclub.com/forum/topic-291159.html |Is d greater than or equal to 0? 1). d is the median of d, 1/d, -d 2).
894| https://gmatclub.com/forum/topic-305945.html |Merle's spare change jar has exactly 16 U.S. coins, each of which is a
876| https://gmatclub.com/forum/topic-298493.html |Question of the week - 45(If A, B, C are three consecutive even .....)
876| https://gmatclub.com/forum/topic-295218.html |Among the respondents of a survey, one-fourth do not like to watch
848| https://gmatclub.com/forum/topic-310090.html |If a and b are non-zero single digit integers such that a^b = 1, what
837| https://gmatclub.com/forum/topic-307200.html |The above equations define how the function f varies with x. Is 0.9 <
835| https://gmatclub.com/forum/topic-296424.html |In the xy-plane line k passes through the origin. Is the slope of line
816| https://gmatclub.com/forum/topic-294336.html |A pentagon with 5 sides of equal length and 5 interior angles of equal
801| https://gmatclub.com/forum/topic-299724.html |In the x-y plane, region S is defined by x 0, y 0 and 3y -5x 15.
795| https://gmatclub.com/forum/topic-305935.html |Each of the five divisions of a certain company sent representatives
794| https://gmatclub.com/forum/topic-293940.html |Seven water stations were set up at equal intervals along the 42-
794| https://gmatclub.com/forum/topic-307207.html |If the sum of the rows and columns of the table are equal, then what i
793| https://gmatclub.com/forum/topic-293464.html |Is k < 0? (1) |2k + 5| = 3k + 1 (2) |k - 2| = 7k
792| https://gmatclub.com/forum/topic-298800.html |Will at least three identical cubes fit inside a cylindrical shipping
789| https://gmatclub.com/forum/topic-299949.html |What is 4x^2 ? (1) |2x 2| + |2x + 2| = 4 (2) |3x 1| + |3x + 1| = 6
786| https://gmatclub.com/forum/topic-312141.html |Every member of a local chess club is assigned one of two skill levels
783| https://gmatclub.com/forum/topic-296750.html |Set P consists of the first n positive multiples of 3 and set Q consis
779| https://gmatclub.com/forum/topic-285819.html |The product of 3 consecutive positive even integers x+1, x+3 and x+5
778| https://gmatclub.com/forum/topic-295493.html |Kunal takes a days to complete a work while Sandeep takes b less d
777| https://gmatclub.com/forum/topic-293729.html |If a and b are non -zero distinct integers, what is the value of a + b
776| https://gmatclub.com/forum/topic-295553.html |'abc' is a 3 digit natural number such that 'abc' = a^3 + b^3 + c^3
774| https://gmatclub.com/forum/topic-305984.html |Given a positive number N, when N is rounded by a certain method (for
767| https://gmatclub.com/forum/topic-288811.html |If ab >0, is (ab)^2 < (ab)^(1/2) ?

The Best Problem Solving Discussions Posted In 2019
* Numbers before links indicate the number of Kudos and Bookmarks received by the post in 2019.

123| https://gmatclub.com/forum/topic-299663.html |Which of the following function follows the rule: f(a + b) = f(a)*f(b)
113| https://gmatclub.com/forum/topic-299896.html |What portion of the set of unique factors of the product of 24 and 385
105| https://gmatclub.com/forum/topic-299102.html |Line K is tangent to the circle with center (0, 0) at (-3, y) such tha
104| https://gmatclub.com/forum/topic-299185.html |What is the digit on the units place in the expanded value of 97^275
104| https://gmatclub.com/forum/topic-299282.html |How many different values of y satisfy |y + 3| = |8 + y| + |4 - y| ?
103| https://gmatclub.com/forum/topic-299470.html |If the 6 letters in the word NEEDED are randomly rearranged, what is
100| https://gmatclub.com/forum/topic-301110.html |If A + B = C, A + D = B, 2C = 3D and A, B, C, and D are positive integ
94| https://gmatclub.com/forum/topic-301113.html |Luis spent a certain amount of money in a supermarket. He spent a thir
93| https://gmatclub.com/forum/topic-300329.html |A pack of fruits has 100 units and its total cost is $117.5. If 17% of
89| https://gmatclub.com/forum/topic-301111.html |A store sells apples in pack of 6, 9, or 20. By ordering 2 packs of 6
88| https://gmatclub.com/forum/topic-294397.html |Of three persons, two take relish, two take pepper, and two take salt.
84| https://gmatclub.com/forum/topic-300783.html |A palindrome is a number that reads the same forward and backward. For
84| https://gmatclub.com/forum/topic-299373.html |If x is an odd integer and y = x(x+1)(x-1), which of the following mus
84| https://gmatclub.com/forum/topic-300483.html |For every positive integer x, f(x) represents the greatest prime fact
83| https://gmatclub.com/forum/topic-294280.html |In the floor plan of an executive's beach house above, the north and
83| https://gmatclub.com/forum/topic-300584.html |What is the remainder when (25^99 x 4^99)^99 is divided by 11?
81| https://gmatclub.com/forum/topic-300248.html |How many even divisors of 1600 are not multiples of 16?
80| https://gmatclub.com/forum/topic-300858.html |What is the tens digit of 7^241?
80| https://gmatclub.com/forum/topic-299715.html |Several teams competed in a mathematical Olympiad. Each team sent thre
79| https://gmatclub.com/forum/topic-300416.html |A movie theatre rewards its loyal customers by offering them discounts
76| https://gmatclub.com/forum/topic-301057.html |Which of the following COULD be correct?
76| https://gmatclub.com/forum/topic-300484.html |Positive integer N has exactly 12 unique factors. What is the largest
75| https://gmatclub.com/forum/topic-300585.html |Which of the following fractions will lead to a terminating decimal?
75| https://gmatclub.com/forum/topic-300971.html |Which of the following is always true?
74| https://gmatclub.com/forum/topic-301053.html |Tap A can fill a tank in 10 hours, tap B can fill it in 20 hours, and,


The Best Data Sufficiency Discussions Posted In 2019

106| https://gmatclub.com/forum/topic-294336.html |A pentagon with 5 sides of equal length and 5 interior angles of equal
98| https://gmatclub.com/forum/topic-299894.html |If Mary and Sue enter a 750 meter swimming competition in which Mary g
91| https://gmatclub.com/forum/topic-299665.html |What is range of the six positive integers: 1, p, 12, q, 15, r?
90| https://gmatclub.com/forum/topic-300967.html |Set A consists of 5 different integers. If 1 is the least number in th
89| https://gmatclub.com/forum/topic-299186.html |What is the area of triangle ABC above, with side lengths x,y, and z?
87| https://gmatclub.com/forum/topic-300325.html |A maritime shipping company sends out at least 1 ship ship every day.
82| https://gmatclub.com/forum/topic-300785.html |In the diagram above, triangle WXY intersects rectangle JKLM at points
82| https://gmatclub.com/forum/topic-300968.html |If n is a positive integer, is 169 a factor of n?
81| https://gmatclub.com/forum/topic-299103.html |If cb < ab < 0, is |c - a| = |c| - |a|?
80| https://gmatclub.com/forum/topic-300859.html |If xy^2z^3 < 0, is xyz>0? (1) y < 0 (2) x < 0
80| https://gmatclub.com/forum/topic-300244.html |A certain customer at a health food store purchased organic bananas at
79| https://gmatclub.com/forum/topic-299796.html |Of the 600 students in a class, each French speaker also speaks German
79| https://gmatclub.com/forum/topic-300418.html |What is the remainder when X is divided by 40?
79| https://gmatclub.com/forum/topic-300583.html |What is the highest common factor of three positive integers X, Y, and
77| https://gmatclub.com/forum/topic-299467.html |What is the highest power of 3 in the value of X! ?
76| https://gmatclub.com/forum/topic-300008.html |If |x| = |y|, x + y = ? (1) x - y = 4 (2) x/y = -1
75| https://gmatclub.com/forum/topic-299717.html |If the positive integer x has 8 positive factors, what is the value of
70| https://gmatclub.com/forum/topic-299281.html |If xy > 0, is y/x + x/y > 2?
69| https://gmatclub.com/forum/topic-299377.html |In a sprint race, a man has to run two distances, D1 and D2, to comple
64| https://gmatclub.com/forum/topic-300485.html |40% of the dogs at a certain animal shelter have been microchipped. Ho
60| https://gmatclub.com/forum/topic-300860.html |A certain building has only 2-room and 3-room apartments to rent. If
56| https://gmatclub.com/forum/topic-288716.html |Is |a-c| + |a| = |c|?
50| https://gmatclub.com/forum/topic-299378.html |If t, p, and q are different positive integers, how many positive inte
43| https://gmatclub.com/forum/topic-294318.html |Is the point Q on the circle with center C ?
42| https://gmatclub.com/forum/topic-294340.html |A rectangular solid has length, width, and height of L cm, W cm, and H


The Best Main Math Forum Discussions Posted In 2019

93| https://gmatclub.com/forum/topic-309579.html |Are You Up For The Challenge?
56| https://gmatclub.com/forum/topic-308725.html |ALL QUANTITATIVE GMAT PREP QUESTIONS (LINKS TO ALL 825 QUESTIONS)
51| https://gmatclub.com/forum/topic-293854.html |The Official Guide for GMAT Quantitative Review 2020
41| https://gmatclub.com/forum/topic-287528.html |Percentage increase/decrease- WHAT should be the denominator??
29| https://gmatclub.com/forum/topic-287181.html |Best Of The Best Of 2018: QUANTITATIVE
17| https://gmatclub.com/forum/topic-311692.html |GMATBusters' GMAT Quant Quiz 2.0
16| https://gmatclub.com/forum/topic-290943.html |GMAT Quant DS - 3 Mistakes Students Make in Number Properties Question
11| https://gmatclub.com/forum/topic-287890.html |Formulas for Consecutive, Even, Odd Integers
10| https://gmatclub.com/forum/topic-287924.html |The Units Digits of Big Powers
8| https://gmatclub.com/forum/topic-286912.html |Data Sufficiency: different answers but both correct
8| https://gmatclub.com/forum/topic-295911.html |Veritas Prep Cat's offer
6| https://gmatclub.com/forum/topic-295394.html |Timing Strategies for Quantitative Section
6| https://gmatclub.com/forum/topic-310026.html |GMAT quant Speed
6| https://gmatclub.com/forum/topic-293172.html |Quant study plan for someone weak in MATH
6| https://gmatclub.com/forum/topic-290991.html |Using Remainder Theorem- Binomial Expression
6| https://gmatclub.com/forum/topic-292656.html |Need Help getting to 47 Q
5| https://gmatclub.com/forum/topic-303168.html |Kinshook's quant questions
5| https://gmatclub.com/forum/topic-300152.html |Inequalities and Absolute Value
5| https://gmatclub.com/forum/topic-299755.html |Properties of Quadrilaterals
5| https://gmatclub.com/forum/topic-295781.html |Prime Numbers Properties & Applications
4| https://gmatclub.com/forum/topic-299536.html |What is next after OG?
4| https://gmatclub.com/forum/topic-311111.html |Best way to track my quant progress?
4| https://gmatclub.com/forum/topic-298042.html |DS: QUadratic: Is this question's answer wrong in the prep book?
4| https://gmatclub.com/forum/topic-295151.html |Difference between two symmetric combinatoric questions?
4| https://gmatclub.com/forum/topic-298362.html |Here is a document containing 700-800 level quant questions Hope this

Who To Follow In Quantitative Forums And Their Two Best Posts In 2019
*Number in front of username indicates the total number of Kudos accumulated by the user in Quantitative forums in 2019.

8845| Bunuel |
79| https://gmatclub.com/forum/p2266048 |A pentagon with 5 sides of equal length and 5 interior angles of equal
66| https://gmatclub.com/forum/p2395227 |Are You Up For The Challenge?
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1391 nick1816
22| https://gmatclub.com/forum/p2299107 |If |x|-|y|=13, then which of the following can't be the value of x-y?
14| https://gmatclub.com/forum/p2272297 |How many ordered pairs of positive integers (m,n) satisfy
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1097 chetan2u
41| https://gmatclub.com/forum/p2216782 |Percentage increase/decrease- WHAT should be the denominator??
9| https://gmatclub.com/forum/p2363082 |Re: In the figure above, X and Y represent locations in a district of a ce
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1037 Dillesh4096
26| https://gmatclub.com/forum/p2304653 |How many different values of y satisfy |y + 3| = |8 + y| + |4 - y| ?
16| https://gmatclub.com/forum/p2316268 |In a rhombus ABCD, AC = 3 units and angle ABC = 120. What is the area
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1035 Archit3110
9|https://gmatclub.com/forum/p2274831|Re: How many positive integers less than or equal to 2017 contain the digi
7|https://gmatclub.com/forum/p2216809|Re: The vessels contain water and milk in the ratio 1:2 and 2:5 are mixed
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803 ScottTargetTestPrep
8 https://gmatclub.com/forum/p2230765 |Re: In how many ways can 10 identical tyres be distributed by the supplier
8 https://gmatclub.com/forum/p2272352 |Re: A company produces a certain toy in only 2 sizes, small or large, and
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772 GMATPrepNow
23| https://gmatclub.com/forum/p2360103 |b, c, d, e, f and g are different positive integers. When b is divided
14| https://gmatclub.com/forum/p2267098 |Re: If 2.00X and 3.00Y are 2 numbers in decimal form with thousandths digi
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746 gmatt1476
47| https://gmatclub.com/forum/p2363472 |The difference 942 249 is a positive multiple of 7. If a, b, and c a
38| https://gmatclub.com/forum/p2363471 |If Whitney wrote the decimal representations for the first 300 positiv
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722 MathRevolution
12| https://gmatclub.com/forum/p2299213 |What is the average (arithmetic mean) of all 5-digit numbers that can
12| https://gmatclub.com/forum/p2335544 |A swimming pool is full of water. Pump A takes 6 hours to empty the po
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659 Kinshook
23| https://gmatclub.com/forum/p2308184 |How many integer values of x satisfy the equation |x-3|+|x-5|<|x-11| ?
16| https://gmatclub.com/forum/p2309206 |How many integer values of x satisfy the equation |x-3|+|x-20|<17?
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638 kiran120680
21| https://gmatclub.com/forum/p2285269 |A quadratic equation is in the form of x^22px + m = 0, where m is
17| https://gmatclub.com/forum/p2272210 |If Line A and Line B are parallel to each other and 7 points are
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624 SajjadAhmad
70| https://gmatclub.com/forum/p2326661 |Patterns among those who have scored 750+
9| https://gmatclub.com/forum/p2373585 |The above equations define how the function f varies with x. Is 0.9 <
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476 EgmatQuantExpert
17| https://gmatclub.com/forum/p2201522 |Question of the week - 30 (A group of 4 persons is to be selected ...)
14| https://gmatclub.com/forum/p2243217 |GMAT Quant DS - 3 Mistakes Students Make in Number Properties Question
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437VeritasKarishma
9| https://gmatclub.com/forum/p2312241 |Re: To a solution having milk and water in the ratio 2 : 3, 15 lts of wate
8| https://gmatclub.com/forum/p2222856 |A distance of 600 km is to be covered using both Train & Bus.
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421firas92
13| https://gmatclub.com/forum/p2297776 |Find the number of ways in which 5 men can watch 4 movies
13| https://gmatclub.com/forum/p2287551 |There is a 7 7 chessboard. Two squares are chosen at random. What is

The Best Integrated Reasoning Discussions Posted In 2019
* Numbers before links indicate the number of Kudos and Bookmarks received by the post in 2019.

41| https://gmatclub.com/forum/topic-306846.html |Project IR Butler 2019-20 - Get one IR Question Everyday
11| https://gmatclub.com/forum/topic-310642.html |GMAT Prep IR Directory Get all official IR questions at one place.
7| https://gmatclub.com/forum/topic-306848.html |Refer to the pictograph of a survey of students at Central Community
4| https://gmatclub.com/forum/topic-298788.html |At the end of last semester all 33 students (11 from each of 3 section
3| https://gmatclub.com/forum/topic-313093.html |Logic games to IR?
3| https://gmatclub.com/forum/topic-305860.html |The recent finding that our school's water system has been contaminate
2| https://gmatclub.com/forum/topic-302149.html |Of the 20 members in a local group of Mensa International, 40% are phi
2| https://gmatclub.com/forum/topic-312121.html |An apple farm installed a fish pond on its land to save money and
2| https://gmatclub.com/forum/topic-313149.html |For the three distinct numbers 1, x, and y, the difference y 1 is on
2| https://gmatclub.com/forum/topic-311141.html |How do You study IR part?
2| https://gmatclub.com/forum/topic-302070.html |Two brothers were talking about how the older they get, the less
2| https://gmatclub.com/forum/topic-310587.html |Ziptrac commuter trains carry passengers between the three cities of A
2| https://gmatclub.com/forum/topic-313289.html |In a Dance Reality Show Dancing with the Stars, there are 10 celeb
2| https://gmatclub.com/forum/topic-312868.html |Projects Mercury, Gemini, and Apollo were the first three crewed space
2| https://gmatclub.com/forum/topic-307047.html |The graphic provides data on world ethanol and biodiesel production,
2| https://gmatclub.com/forum/topic-312015.html |Two water storage tanks, Tank A and Tank B, can each hold more than 20
2| https://gmatclub.com/forum/topic-302148.html |A certain snail can travel at a rate of 1 millimeter per second. A
2| https://gmatclub.com/forum/topic-305531.html |Island Museum analyzes historical artifacts using one or more techniqu
2| https://gmatclub.com/forum/topic-312265.html |The table below displays data from the different divisions of Company
2| https://gmatclub.com/forum/topic-303015.html |Two companies are competing with one another for a contract to provide
1| https://gmatclub.com/forum/topic-312941.html |The graph indicates the percentage of land used for agricultural purpo
1| https://gmatclub.com/forum/topic-293848.html |IR MGMAT 5th vs 6th Edition
1| https://gmatclub.com/forum/topic-313152.html |Two siblings, P and Q, worked together to steal cookies from their par
1| https://gmatclub.com/forum/topic-313009.html |At the end of each of seven years, a small chain of health clubs repor
1| https://gmatclub.com/forum/topic-313150.html |For his astronomy project, Brandon researched the weather patterns of