Free GRE Practice Questions

Question 1 of 1
Section: Quantitative Reasoning - Comparison
Topics: Number Properties; Factors; Perfect Numbers; Reciprocals
Difficulty level: Challenging

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A positive integer x is a perfect number if the sum of all the factors of x, including 1 and x, is equal to 2x.

  • Quantity A

    The sum of the reciprocals of all the factors of the perfect number 28

  • Quantity B


AQuantity A is greater.
BQuantity B is greater.
CThe two quantities are equal.
DThe relationship cannot be determined from the information given.