GRE
The least possible value of $$x$$
0
The price per ounce of the liquid in the small bottle
The price per ounce of the liquid in the large bottle
2r
$$\frac{1}{r}$$
The number of points (a, b) on circle C where both a and b are integers
The number of points (a, b) on circle D where both a and b are integers
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