《pp398-432》.pdf
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GRE Practice Test
SECTION 5
Quantitative Reasoning
25 Questions with Explanations
A Quantity A is greater.
B Quantity B is greater.
C The two quantities are equal.
D The relationship cannot be determined from the information given.
x
3
O
3
4
O is the center of the circle above.
Quantity A Quantity B
1. x 5 A B C D
Explanation
In this question you are asked to compare x with 5, where x is the length of a
line segment from the center of the circle to a point inside the circle. In a circle
the easiest line segments to deal with are the radius and the diameter. Looking at
the figure in the question, you can see that you can draw two radii, each of
which “completes” a right triangle, as shown in the figure below.
3 x
r O
3 r
4
Since in one of the triangles, the lengths of both legs are known, you can use
that triangle to determine
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