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Lesson: qc02

Quantitative Comparisons 6 Step Plan

The first task in this lesson is to learn the 6 basic steps for handling any GRE Quantitative Comparison. Just ahead, you’ll apply these steps to three GRE-style Quantitative Comparisons.

Step 1: Size Up the Question

What general area does the question deal with? What mathematical principles and formulas are likely to come into play? Does it appear to require a simple arithmetical calculation, or does it seem more “theoretical”—at least at first glance?

Step 2: Check for Shortcuts and Clues

Check both quantities for possible shortcuts and for clues as to how to proceed. Here are three different features to look for:
If both quantities contain common numbers or other terms, you might be able to simplify by canceling them. Be careful, though; sometimes you can’t cancel terms. (See the strategies later in this chapter.)
If one quantity is a verbal description but the other one consists solely of numbers and variables, you’re dealing with a Problem Solving question in disguise. Your task is to work from the verbal expression to a solution, then compare that solution to the other quantity.
If the centered information includes one or more equations, you should probably solve the equation(s) first.

Step 3: Deal with Each Quantity

If the problem includes any centered information (above the two quantities), ask yourself how the quantity relates to it. Then do any calculations needed.

Step 4: Consider All Possibilities for Unknowns (Variables)

Consider what would happen to each quantity if a fraction, negative number, or the number zero (0) or 1 were plugged in to the expression.

Step 5: Compare the Two Quantities

Compare the quantities in ColumnsAand B. Select one of the four answer choices, based on your analysis.

Step 6: Check Your Answer

If you have time, double-check your answer. It’s a good idea to make any calculations with pencil and paper so you can double-check your computations before confirming the answer. Also, ask yourself again:
  • Did I consider all possibilities for unknowns?
  • Did I account for all the centered information (above the two quantities)?
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Video Lessons and 10 Fully Explained Grand Tests

Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.

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