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GMAT Work - Combined Rates

by ejkiv


July 19, 2015


These problems are often referred to as combined work or even simultaneous work problems. In reality they are combined rate problems, but worth their individual attention. The rate equation is the exact same here, but typically, instead of distance we are computing some output. This means: GMAT work problems are just like a rate problem in which you add the rates for a combined rate. Thus, the sum of two rates will give you the combined output. Or: These problems will typically entail ...

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GMAT Interest

by ejkiv


July 19, 2015


This is another one of the topics that you will likely see more of in your first year of business school than on the GMAT, but getting down a few pieces of terminology and understanding how they are used will make your stress level come down if you see one on the exam and during your first year finance class. Principle: The amount of an investment Simple Interest: Interest that is paid on the principle alone You do not have to memorize the formula above, but know that the interest am...

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GMAT Mixtures

by ejkiv


July 19, 2015


GMAT mixtures come in a variety of different forms, but generally mixture problems are just weighted average problems. There are a few differences that we will go over, but think of them in the same manner. This is an example: Solution A consists of 20% iodine and solution B is 5% iodine. If 15 ounces of solution B is mixed with solution A to make a combined solution of 10%, how many ounces of solution A are used? For this we can just set up a weighted average problem:     We will use the ...

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GMAT Rates

by ejkiv


July 19, 2015


Honestly, a rate is exactly the same thing as a ratio. You are simply comparing two numbers with GMAT rates. However, because GMAT rates typically are based on some unit of time the question types are a little different than the ratio question types. Most often this is some output per unit of time: miles per hour meter per second sales per year However, rates can also be between other things: sales per customer window per building customers to table Ratios can be used to show this re...

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GMAT Percents

by ejkiv


July 19, 2015


As we showed in the previous section, ratios can be represented in percent form. As such, GMAT percents are also a way to show the relationship between numbers. First let’s cover the format of percents: Clearly to move from percent to decimal you divide by 100. Also, being able to move interchangeably between fractions, decimals and percents will help tremendously on GMAT percents problems. Personally, I will always try to convert back to fractions as the math tends to be the easiest. As ...

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GMAT Ratios

by ejkiv


July 19, 2015


GMAT ratios are no different than other ratios.  A ratio is simply a relationship between two numbers. You may see ratios of more than two numbers, and we will look at that soon; however, even that is just a series of relationships. Most often you will see a ratio represented with a colon (:). Yet, a ratio can be set up as a fraction or potentially even a decimal or percent. Shortly we will discuss how being able to move between formats can help cut down on time spent on individual problems. ...

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GMAT Word Problems

by ejkiv


July 16, 2015


Word problems really encompass most of the exam. While pretty much any of the disciplines can be written in the form of a word problem, there are certain types of problems that fall almost entirely in this section. Before getting into the section it is worth studying the chart below. This chart shows a lot of cue words you will find in the word problems and what they mean. Remember that one of the important things to consider when working through word problems is to translate the infor...

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