**QC Strategies - Picking Numbers**

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Summary

The strategy of picking numbers in GRE quantitative comparison questions is a nuanced technique that involves selecting specific values to test the relationships between quantities, especially when variables are involved. This approach has its strengths and limitations, requiring a blend of strategic selection and logical analysis to effectively determine the correct answer.

- Picking numbers is particularly effective for questions involving variables in both answer choices or when comparing a variable to a number with an algebraic expression.
- This strategy can definitively identify 'D' (the quantities cannot be determined) as the correct answer when different numbers yield different relationships between the quantities.
- Picking numbers alone cannot always definitively determine the answer; logical and mathematical reasoning is often required to ascertain whether 'A', 'B', or 'C' is correct.
- It's crucial to consider different categories of numbers when picking numbers, including positive, negative, integers, fractions, and decimals, to ensure a comprehensive analysis.
- The art of picking numbers well involves not just random selection but thoughtful consideration of the mathematical situation to guide the choice of numbers.

Chapters

00:01

Introduction to Picking Numbers

02:39

Efficiency and Limitations of Picking Numbers

06:26

Strategic Selection and Logical Analysis

10:01

The Art of Picking Numbers

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