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12/25/11

GRE Quantitative Reasoning: Quantitative Comparison Questions


The Quantitative Comparison questions ask you to compare two quantities – Quantity A and Quantity B – and choose one of four answers:
  1. Quantity A is greater
  2. Quantity B is greater
  3. The two quantities are equal
  4. The relationship cannot be determined from the information given.
The quantity A and B are given in two different columns. Sometimes, additional information about the quantities or variables referenced in the two quantities is also provided with the question. Quantitative comparison questions can be easily solved using elimination techniques.
Tips and Tricks for Quantitative Comparison:
  1. Remember that every Quantitative Comparison question has the same four answer choices. Become familiar with these four.
  2. For simple algebraic questions (i.e. x2 and x4), plug in different numbers and see how the answers compare. Try positive and negative numbers, large and small numbers, and decimals and fractions. If Quantity A is not always larger, smaller, or equal to Quantity B, then choose “the relationship cannot be determined from the information given.”
  3. Remember that figures are not drawn to scale. Redraw the figure, keeping the features that are determined by the description constant but changing those features that are not determined.
Example:
Q1.
y > 1
Quantity A
Quantity B
y8
(y4)2
  Quantity A is greater.
  Quantity B is greater.
  The two quantities are equal.
The relationship cannot be determined from the information given.
Answer: C 

Solution: 
Remember the exponent rules? One of them states that, when you raise a number with a power to a power, the exponent of the resulting number is the product of the two powers e.g.:


C is the correct answer.

2 comments:

Unknown said...

Thanks for your share! I think this information is helpful for everyone. I'm doing practice GRE here: masteryourgre.com . I hope it's useful for GRE test takers.

GMAT Atlanta

Unknown said...

Thanks for sharing the Quanti Questions.Comparing Verbal, Quant is not so tough but still you need a well-defined plan based on GRE Quantitative Syllabus to crack the GRE Quant.

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