# Free GRE Practice Questions

Question 1 of 1
ID: GRE-QCQ-5
Section: Quantitative Reasoning - Comparison
Topics: Number Properties; Factors; Perfect Numbers; Reciprocals
Difficulty level: Challenging

(Practice Mode: Single selected Question » Back to Overview)

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

2

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