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Anatomy of GRE Verbal Reasoning Section
There are only three types of questions on a GRE verbal reasoning section: text completion, sentence equivalence, and reading comprehension. (Text completion and sentence equivalence are quite similar, as discussed in our last article.) Feel at home on the verbal...
Master the GMAT Data Insights Questions
Preparing for the GMAT exam requires a thorough understanding of the different question types, including the challenging Data Insights Questions. This article aims to provide you with techniques and strategies to excel in GMAT Focus Data Insights Section. By mastering...
A Glossary of Math Terms the GRE Expects You to Know
Have you begun studying for the GRE quantitative reasoning sections? Are you being held up by the recurring appearance of math terms whose definitions you don’t fully understand? We are here to help! Read through our glossary of math terms to know for GRE quantitative...
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GMAT Prime Factorization (Anatomy of a Problem)
By: Rich Zwelling (Apex GMAT Instructor) Date: 1st April 2021 First, if you’d prefer to go straight to the explanation for the solution to the problem given in the last post, continue to the end of this post. But we’ll start with the following Official Guide GMAT...
Ace GMAT Data Sufficiency Questions with this Science Fair Problem
Data Sufficiency Problem Video Transcript Introduction to Data Sufficiency Hey guys! Today we're looking at the Science Fair Problem. In this Data Sufficiency, we're being asked how many, discrete number, of the 900 students at the school attended all three days. And...
A Primer on Primes
By: Rich Zwelling (Apex GMAT Instructor) Date: 30th March 2021 As I said in my previous post, GMAT Prime Numbers are my favorite topic. This is because not only are they inherently interesting mathematically but they show up in unexpected circumstances on GMAT...
Consecutive Integers and Data Sufficiency (Avoiding Algebra)
By: Rich Zwelling (Apex GMAT Instructor) Date: 25 March 2021 Last time, we left off with the following GMAT Official Guide problem, which tackles the Number Theory property of consecutive integers. Try the problem out, if you haven’t already, then we’ll get into the...
Standard Deviation Problem On The GMAT (Normative Distribution)
Standard Deviation 700+ Tips Hey guys! Today, we're going to take a look at a standard deviation problem. And standard deviation is a concept that only comes up infrequently on the GMAT. So it's more important to have a basic understanding of the concepts associated...
Consecutive Integers (plus more on Odds and Evens)
By: Rich Zwelling, Apex GMAT Instructor Date: 23rd March, 2021 In our last post, we left you with a GMAT Official Guide Data Sufficiency problem to tackle regarding Odd/Even Number Theory. Here it is, if you didn’t get a chance to do it before: If x and y are...
Odds and Ends (…or Evens)
By: Rich Zwelling, Apex GMAT Instructor Date: 18th March, 2021 Last time, we signed off with an Official Guide GMAT problem that provided a nice segue into Number Theory, specifically today’s topic of GMAT Odds and Evens. Now we’ll discuss the solution. Here’s the...
Sequence Problem on the GMAT
Key Information to Know About Sequences Hey guys! When we see sequences on the GMAT whether in the problem solving or the data sufficiency section they have two important characteristics. One is how they work, the other is anchoring the sequence to a particular set of...
When Probability Meets Combinatorics: One Problem, Two Approaches
By: Rich Zwelling, Apex GMAT Instructor Date: 16th March, 2021 Now, we’d like to take a look at an Official GMAT Probability problem to pull everything together. The following is a good example for two reasons: 1. It illustrates a quirky case that is difficult more...
An “Undesired” Approach to GMAT Probability
By: Rich Zwelling, Apex GMAT Instructor Date: 11th March, 2021 In our last post, we discussed a solution for the following question, which is a twist on an Official Guide GMAT probability problem: Xavier, Yvonne, and Zelda individual probabilities for success on a...
GMAT Ratio Problem – Mr. Smiths Class
GMAT Ratio DS Problem Expressing Different Notations Hey guys! Expressing different notations is often challenging when you're first starting out on the GMAT and by different notations mean percentages fractions decimals ratios. We learn all these separately and we...
Independent vs. Dependent Probability
By: Rich Zwelling, Apex GMAT Instructor Date: 8th March, 2021 Independent vs. Dependent Probability As promised last time, we’ll return to some strict GMAT probability today. Specifically, we’ll discuss the difference between independent and dependent probability....
Combinations with Restrictions
By: Rich Zwelling, Apex GMAT Instructor Date: 4th March, 2021 In our previous post, we discussed how GMAT combinatorics problems can involve subtracting out restrictions. However, we discussed only PERMUTATIONS and not COMBINATIONS. Today, we’ll take a look at how the...
Permutations with Restrictions
By: Rich Zwelling, Apex GMAT Instructor Date: 2nd March, 2021 So far, we’ve covered the basics of GMAT combinatorics, the difference between permutations and combinations, some basic permutation and combination math, and permutations with repeat elements. Now, we’ll...
5 Takeaways from a Successful EA Journey
Each client that contacts us is in a different stage of their Executive Assessment prep, but a universal constant is that each is striving for a great 165+ EA score. The threshold difficulty standing in their way is the lack of a proper mindset, which in turn can lead...
What Happens When Permutations Have Repeat Elements?
As promised in the last post, today we’ll discuss what happens when we have a PERMUTATIONS situation with repeat elements. What does this mean exactly? Well, let’s return to the basic example in our intro post on GMAT combinatorics: If we have five distinct paintings,...
An Intro to Combination Math
Last time, we looked at the following GMAT combinatorics practice problem, which gives itself away as a PERMUTATION problem because it’s concerned with “orderings,” and thus we care about the order in which items appear: At a cheese tasting, a chef is to present some...
A Continuation of Permutation Math
Review of Example From Last Post Last time, when we started our discussion of GMAT Combinatorics, we gave a brief example of GMAT permutations in which we had five paintings and asked how many arrangements could be made on a wall with those paintings. As it turns out,...
Data Sufficiency: Area of a Triangle Problem
Hey guys! Today we're checking out a geometry Data Sufficiency problem asking for the area of a triangle, and while the ask might seem straightforward, it's very easy to get caught up in the introduced information on this problem. And this is a great example of a way...
Triangles With Other Shapes
As discussed before, now that we’ve talked about the basic triangles, we can start looking at how the GMAT can make problems difficult by embedding triangles in other figures, or vice versa. Here are just a few examples, which include triangles within and outside of...
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