GMAT Math Articles

My last several posts have been devoted to the use of a table to answer rate problems. Today’s post will assume familiarity with that table, so please take a look back at these posts is you’re not already familiar … Read More

The GMAT is an exam that evaluates how you think. The test is designed to measure your reasoning skills and gauge how successful you will be in business school. This means that the test is not simply trying to ascertain … Read More

My last few blog posts have involved rate problems about simultaneous movement. In each of these problems we discovered exactly two travelers who either (1) moved at their own constant rates for the entire time period … Read More

As I specified in my review of Algebra Strategy Guide, Manhattan GMAT’s 6th Edition Strategy Guides arrived on 2nd December. If you just came to know about these guides, I encourage you to first go through the … Read More

Let’s recap where we left off yesterday. We were working with this diagram: We wanted to solve for Mary’s time, t. In every row the relationship among rate, time, and distance is the same: RT=D. In this diagram the … Read More

In my last couple of posts (Using Diagrams to Solve GMAT Rate Problems Part 1 and Part 2) I used a RateTimeDistance table, (or RTD table) to solve the most common sort of rate problem: a combinedrate problem in which … Read More

Welcome to our third and final installment dedicated to those pesky maximize/minimize quant problems. If you haven’t yet reviewed the earlier installments, start with part 1 and work your way back up to this post. … Read More

Last time, we discussed two GMATPrep® problems that simultaneously tested statistics and the concept of maximizing or minimizing a value. The GMAT could ask you to maximize or minimize just about anything, so the latter … Read More

In Part 1 we used what is called an RTD table to solve a fairly typical rate problem. Today I want to revisit the problem in Part 1 to make a simple point: There’s more than one correct way to use the table. If you … Read More

Blast from the past! I first discussed the problems in this series way back in 2009. I’m reviving the series now because too many people just aren’t comfortable handling the weird maximize/minimize problem variations … Read More

Diagrams are great! Like all types of scratchwork, diagrams can forestall cognitive fatigue because working a problem out on paper is much less demanding than doing all the work in your head. Diagrams can also help you … Read More

GMAT Data Sufficiency questions test your ability to analyze a quantitative problem and recognize which information is necessary to figure out the solution. What a data sufficiency question does NOT test you on is your … Read More

Here are four practice problems involving similar figures. 1) In the figure, KLMN is a square, and angle KJN = 45°. Find the area of figure JKLMN. 2) In the diagram, HJLM is a square, and GH = 10. Find the area of … Read More

In the last article, we learned the algebraic approach and the inputoutput approach for solving questions with variables in the answer choices (VIACs). In that article, I ended by saying that, while the inputoutput … Read More