Question: What is the circumference of a circle with radius 5 units? How does it compare to the perimeter of a rectangle with length 8 units and width 6 units?
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What is the radius of a circle whose equation is x^2 + y^2 = 25?
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Math question: What is the limit as x approaches 2 of (2x^2 + 3x - 4) / (x^2 - 4)?