TIP
For more information
about the two types of
thinking, see Instructor
Liz Ghini Moliski's arti
cle on the Dual Process
Model in Chapter 3.
■ M
..
The Big Picture of GMAT Quant
Understand
The GMAT simply doesn’t use cookie-cutter problems: the writers are constantly
crafting new twists and turns to throw at you. For this reason, it is essential that you
understand the nuances of the problem in front of you and consciously decide how to
approach it before you begin to wildly throw equations down on the page.
In order to understand a Quant problem, begin by asking yourself these two methodi
cal questions:
(1) What am I given?
(2) What do I need?
Because Quant problems are often chock full of information, it is important to work
your way through the problem sentence by sentence, phrase by phrase, to ensure that
you pull out all of the information. Write down all of the information that you gather
on your scrap paper; attempting to store information in your head reduces the available
brain power that you have to apply towards actually solving the problem. Also, putting
all of the information down in one place will help you see the relationships between
the pieces of information, recognize patterns, and minimize the probability that you
will forget a pivotal caveat at a crucial time during the solving process.
Looking at this problem, the first thing that jumps out is that it’s practically a para
graph written in the Quant section. This is the pattern of word problems— that should
alert you to the fact that you need to translate the English into Math. Also, you should
identify questions that take up more than two lines as ones that can often be translated
into equations with the help of a picture and/or a chart.
A key word in this problem is rate. Whenever a problem involves a rate, the equation
Rate x Time = Distance should pop into your head. Problems involving rates almost
always require this equation. It’s a good thing to write down at the top of your page.
Also, you should recognize that rate problems can often be drawn, so try sketching a
diagram!
Once you’ve noticed a couple of big-picture elements in the problem, it’s time to dissect
the question methodically, starting at the beginning. The first sentence begins Reggie
was hiking on a 6-mile loop.... Aha! There’s a path. It’s 6
miles long. And it’s circular. Draw it! Make sure to write
down that it is 6 miles long. Also, draw an arrow to show
Reggie walking along it. Choose the variable “R” for Reggie
because it will be the easiest to remember.
The sentence continues at a rate of 2 miles per hour. Add
Reggie’s rate to your picture. Continue drawing until you
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