One of the many GMAT math concepts that we learn in grammar school but probably don’t use very often in real life is how to work with factors. Factors are numbers that go into other numbers evenly. For example, 3 and 4 are factors of …

Read More## How to Avoid More Data Sufficiency Traps

Several months ago I wrote a post about not jumping to conclusions on data sufficiency questions. Sometimes, you will need to do more math on these questions than you think is necessary in order to avoid selecting a trap answer. Today’s post will be a …

Read More## Percents: More than Calculating Tips

Even if you have already learned how to accurately and quickly calculate a tip using mental math, you may still be struggling with percentage questions on the GMAT. Today we will look at three questions that test percents in different ways. Let’s start with …

Read More## To the Right, To the Right

When working geometry problems on the GMAT, you are certain to come across several that deal with right triangles and your old middle school friend, Pythagoras. Remember him? He was the a2 + b2 = c2 guy. While Pythagoras and his theorem won’t let you …

Read More## If Two Trains Leave their Stations at the Same Time…

It’s the dreaded train question! We all remember this one from elementary school…the trains leave at the same time travelling towards each other but at different rates. What time do they meet? And here it is again in the GMAT Official Guide (13th Edition), on …

Read More## The Quick and the Quicker: Improving Your GMAT Score

Hey there, future MBA graduates! How are you progressing with the 30 Day GMAT method? What’s that? You say that you haven’t started and you have fewer than 30 days to study? No worries – we have some help for you too! Introducing 31 quick …

Read More## What if I’ve Never Seen that Question Type Before?

If you have done any GMAT practice yet, you have probably realized that there is plenty of algebra and geometry on the test. Those two question types undoubtedly make up the majority of the questions, so you need to be very comfortable and efficient answering …

Read More## Get Over Your Fear of Fractions!

If you’ve read the Assigning Values section in my book, you probably already have a good working knowledge of the fundamentals of this strategy. You will probably immediately recognize that question 198 on page 180 of the GMAT Official Guide 13th Edition is a good …

Read More## The Official Guide 13th Edition How To Quantitative: Page 166, #104

With 75 minutes to solve 37 questions, you have roughly 2 minutes per question on the quantitative section. Since you aren’t allowed to skip back and forth among questions, you need to pace yourself wisely, which means identifying opportunities to take (accurate) shortcuts on some …

Read More## The Official Guide 13th Edition How To Quantitative: Page 281, #72

Every so often, the Official Guide explains a question in terms of strategy, rather than just pure math, but these helpful moments are few and inconsistently applied. In this question, the reason that statement (1) is not sufficient is demonstrated through a strategy of assigning …

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