Search found 10365 matches


Re: If a( a + 2) = 24

Hi All, This prompt gives us two equations to work with: A(A+2) = 24 B(B+2) = 24 And we’re told that A is NOT equal to B. We’re asked for the sum of A+B. At first glance, the two equations appear to be identical (meaning that A would equal B). However, since we’re told that those two values are NOT ...

by [email protected]

Tue Apr 20, 2021 8:35 pm
Forum: Problem Solving
Topic: If a( a + 2) = 24
Replies: 2
Views: 1328

Re: OG 16 Question 67

Hi All, We’re told that K is an integer and that (.0025)(.025)(.00025)(10^K) is an INTEGER. We’re asked for the least possible value of K. Since we’re given a lot of numbers to work with, this is essentially just an Arithmetic question – but you might find the work much faster to deal with depending...

by [email protected]

Tue Apr 20, 2021 8:35 pm
Forum: Problem Solving
Topic: OG 16 Question 67
Replies: 9
Views: 4043

Re: If x/y = c/d and

Hi All, While this Roman Numeral question looks a bit complicated, it just involves comparing fractions, so we can use basic Arithmetic rules to answer it (and you can solve it Algebraically or by TESTing VALUES.) To start, you should notice that C/D and D/C appear in the two equations – meaning tha...

by [email protected]

Tue Apr 20, 2021 8:34 pm
Forum: Problem Solving
Topic: If x/y = c/d and
Replies: 3
Views: 1918

Re: OG 2018 problem solving #89

Hi All, We’re told that a 10 total ounces of water is evaporated at a rate of 0.01 ounces of water each day for 20 days. We’re asked what PERCENT of the water EVAPORATED during those 20 days. You should notice that the 5 answers all involve percentages AND decimals (so this is a ‘decimal shift’ ques...

by [email protected]

Tue Apr 20, 2021 8:33 pm
Forum: Problem Solving
Topic: OG 2018 problem solving #89
Replies: 5
Views: 6466

Re: Closest to 1/2?

Hi All, We’re asked which of the following fractions is CLOSEST to ½. There are a number of different ways to approach the Arithmetic in this question (and you can use the given fractional answers or convert them to decimals). Since the numerator of each answer is MORE than half of the denominator, ...

by [email protected]

Tue Apr 20, 2021 8:33 pm
Forum: Problem Solving
Topic: Closest to 1/2?
Replies: 8
Views: 5769

Re: OG Shawana made a schedule

Hi All, We’re told that Shawana is going to read for 28 days with the following restrictions: -She will read 50 pages a day from 1 book (or fewer, if doing so would complete that book) -She will never read from more than 1 book a day. We’re asked how many total books she will read in the 28-day time...

by [email protected]

Tue Apr 20, 2021 8:32 pm
Forum: Problem Solving
Topic: OG Shawana made a schedule
Replies: 4
Views: 1861

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: 3400

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: 3930

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: 3311

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: 1571

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: 2750

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: 2704

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: 4048

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: 2842