GRE® Quantitative Comparison (QC)

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What is Quantitative Comparison (QC)?

Quantitative Comparison is a type of question that appears in the GRE quant section. In this type of question, the test taker has to compare two quantities A and B and determine a relationship between which of the two is larger. Four answer options are presented to the test taker. One of A or B could be larger, both A and B could be equal or a comparison may not be possible.

What topics are tested as GRE Quantitative Comparison (QC)?

The GRE quantitative comparison question can appear from any of the 20 odd math topics tested in the GRE quant section. It could be from algebra, numbers, integers, number line, rates, ratio, percents, fraction, mixtures, simple and compound interest, permutation combination, probability, geometry, coordinate geometry, and set theory. Wizako's GRE question bank for QC comprises questions from many of the topics. The topic from which the question in the questionbank appeared is mentioned alongside the question.


  1. GRE Quantitative Comparison in Probability

    Quantity A Quantity B
    The probability that a word selected from the set of all rearrangements of the letters of the word "Math" results in "Math" The probability that a word selected from the set of all rearrangements of the letters of the word "Good" results in "Good"
    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
    Choice B
    Quantity B is greater
    Approach to solve this GRE Probability QC Question

    Step 1: Quantity A : Compute the number of ways the letters of the word MATH can be rearranged. That will be denominator to compute the probability for quantity A.
    Step 2: The numerator is 1 because in only one of the different rearrangements will we get the same word MATH. Compute the probability using information obtained in steps 1 and 2 for quantity A
    Step 3: Quantity B : Compute the number of ways the letters of the word GOOD can be rearranged. That will be denominator to compute the probability for quantity B.
    Step 4: The numerator is 1 because in only one of the different rearrangements will we get the same word Good. Compute the probability using information obtained in steps 1 and 2 for quantity B
    Step 5: Compare results obtained for both quantities and determine the answer.


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