Search found 10359 matches


Re: In the xy coordinate plane, which of the following

Hi All, With this prompt, we’re asked which of the following points will ALWAYS lie on the line (K)(X) + 3(Y) = 6 for EVERY possible value of K. This is a great ‘concept question’, meaning that you don’t have to do a lot of math to answer it if you recognize the concept involved (and that concept is...

by [email protected]

Mon Apr 19, 2021 8:40 pm
Forum: Problem Solving
Topic: In the xy coordinate plane, which of the following
Replies: 4
Views: 3396

Re: Four staff members

Hi All, We’re told that four staff members spent time working on a project in the ratio of 2:3:5:6 and that ONE of the staff members worked 30 hours. We’re asked which of the following could NOT be the total number of hours worked by the four members. Since this question involves ratios, it’s worth ...

by [email protected]

Mon Apr 19, 2021 8:36 pm
Forum: Problem Solving
Topic: Four staff members
Replies: 5
Views: 3926

Re: Which of the following expressions can be written as an inte

Hi All, We’re asked which of the following Roman Numerals can be written as an INTEGER. While Roman Numeral questions can sometimes be time-consuming, this one is relatively straight-forward and is built on a couple of Number Property rules that can help you to avoid doing heavy calculations. You al...


Re: Must be a multiple of what number?

Hi All, This prompt gives us lots of information to work with. We’re told: X and Y are POSITIVE INTEGERS Y is a multiple of 5 3X + 4Y = 200 We’re then asked what X MUST be a multiple of. This question can be solved with a bit of Arithmetic and TESTing VALUES. There’s also a subtle Number Property Ru...

by [email protected]

Mon Apr 19, 2021 8:31 pm
Forum: Problem Solving
Topic: Must be a multiple of what number?
Replies: 7
Views: 3306

Re: OG Which of the following is greatest

Hi All, We’re asked which of the 5 answer choices is GREATEST. Calculating all of those square roots would be tedious; thankfully, we can modify all 5 answer choices in the same way so that we can AVOID doing those specific calculations. From the wording of the prompt, we know that one of the 5 answ...

by [email protected]

Mon Apr 19, 2021 8:26 pm
Forum: Problem Solving
Topic: OG Which of the following is greatest
Replies: 5
Views: 1564

Re: Standard deviation table

Hi All, While this question gives us a table full of data, we’re ultimately asked to think about which of the 5 Companies has the highest Standard Deviation in its data – and the GMAT will NEVER actually ask you to calculate S.D. Understanding the basic concepts behind S.D. are necessary though. In ...

by [email protected]

Mon Apr 19, 2021 8:21 pm
Forum: Problem Solving
Topic: Standard deviation table
Replies: 6
Views: 2744

Re: If p is the perimeter of rectangle Q...

Hi All, The question asks us to figure out the PERIMETER of rectangle Q. For that, we'll need the length (L) and width (W) of the rectangle. 1) Each diagonal of rectangle Q has length 10. From this Fact, we can create one equation: L^2 + W^2 = 10^2 Unfortunately, there are lots of different values f...

by [email protected]

Sun Apr 18, 2021 3:31 pm
Forum: Data Sufficiency
Topic: If p is the perimeter of rectangle Q...
Replies: 2
Views: 2700

Re: salary of the 10 employees

Hi All, We’re told that the AVERAGE salary of 10 employees last year was $42,800 (meaning that the TOTAL of those salaries was $428,000). We’re asked for the average salary of those same 10 employees this year. This is a great “concept” question – meaning that you do not actually have to do any math...

by [email protected]

Sun Apr 18, 2021 3:29 pm
Forum: Data Sufficiency
Topic: salary of the 10 employees
Replies: 12
Views: 4042

Re: OG A container in the shape

Hi All, We’re told that a cylindrical tank (re: a cylinder/tube) is HALF full of water and contains 36 cubic inches of water (with the height of the CONTAINER equaling 9 inches). We’re asked for the DIAMETER of the base of the cylinder in inches. Volume of a cylinder is (pi)(Radius^2)(Height), so we...

by [email protected]

Sun Apr 18, 2021 3:28 pm
Forum: Problem Solving
Topic: OG A container in the shape
Replies: 3
Views: 2837

Re: Can you help with this problem? Thanks!

Hi All, We’re told that S and T are both POSITIVE INTEGERS and that S/T = 64.12; we’re asked which of the 5 answers COULD be the remainder when S is divided by T. The wording of the question implies that there is more than one possible answer, so the first example that we come up with might not be l...

by [email protected]

Sun Apr 18, 2021 3:24 pm
Forum: Problem Solving
Topic: Can you help with this problem? Thanks!
Replies: 5
Views: 1959

Re: D10 OG 12 Page 21 Geometry

Hi All, To start, it’s incredibly rare to see a Quant question on the GMAT with so many inter-connected shapes (including a hexagon!), so you shouldn’t worry about this question if you got it wrong the first time you attempted it. You can solve it with a mix of Geometry rules and TESTing VALUES. Wit...

by [email protected]

Sun Apr 18, 2021 3:22 pm
Forum: Problem Solving
Topic: D10 OG 12 Page 21 Geometry
Replies: 8
Views: 5014

Re: OG Closed cylindrical tank Q

Hi All, We’re told that a cylindrical tank (re: a cylinder/tube) contains 36pi cubic feet of water and is filled to HALF of its capacity; when placed upright, the water reaches 4 feet high. We’re asked how high the water reaches when the tank is placed on its side. One of the ‘keys’ to solving this ...

by [email protected]

Sun Apr 18, 2021 3:21 pm
Forum: Problem Solving
Topic: OG Closed cylindrical tank Q
Replies: 3
Views: 3433

Re: A total of 30 percent of the geese included

Hi All, We're told that 30 percent of a group of geese were male and that SOME of the geese migrated during the study (with 20 percent of that subgroup of migrating geese being male). We're asked for the RATIO of the migration rate for the MALE geese to the migration rate for the FEMALE geese. This ...

by [email protected]

Thu Aug 20, 2020 12:45 pm
Forum: Problem Solving
Topic: A total of 30 percent of the geese included
Replies: 5
Views: 3386

Re: A magician has five animals in his magic hat: 3 doves and 2 rabbits.

Hi All, We're told that a magician has 5 animals in his magic hat: 3 doves and 2 rabbits. We're asked - if he pulls two animals out of the hat at random, what is the chance that he will have a matched pair. The 'math' behind this question isn't too difficult, but you have to consider 2 outcomes to p...


Re: k = 2^n + 7, where n is an integer greater than 1. If k is divisible by 9,

Hi All, We're told that K = (2^N) + 7, where N is an integer greater than 1 AND K is divisible by 9. We're asked which of the following MUST be divisible by 9? This is a great 'concept question', meaning that you don't actually have to do much math to answer this question if you recognize the concep...