Free GRE Practice Questions

Question 1 of 1
ID: GRE-SMQ-18
Section: Quantitative Reasoning - Multiple Choice with one or more answer
Topics: Geometry; Quadrilateral
Difficulty level: Challenging

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A locomotive engine runs at a maximum speed of 40 miles per hour. It is used to pull a number of compartments with its speed reducing in proportion to the square of the number of compartments attached to it. While pulling 4 compartments, its speed reduces to 24 miles per hour. Which of the following could be the number of compartments the locomotive is capable of pulling?

Indicate all such numbers.

[ Note: Select one or more answer choices ]

A5
B6
C7
D8
E9