GRE Quantitative Comparison practice
Twenty original Quantitative Comparison questions, with the four-choice answer format and the cases that make cannot be determined the right answer. Full solutions for every one. Free, no signup.
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Choose A if Quantity A is greater, B if Quantity B is greater, C if the two quantities are equal, or D if the relationship cannot be determined from the information given.
A method for Quantitative Comparison.
Know the four choices cold
Quantity A greater, Quantity B greater, the two equal, or the relationship cannot be determined. The fourth option is the one most people forget when a variable is unconstrained.
Test boundary and special values
Try 0, 1, a negative, and a fraction. If two valid values give different comparisons, the answer is D, cannot be determined.
Compare, do not compute
You rarely need the exact values. Simplify both quantities the same way, or subtract one from both, until the comparison is obvious.