College Math CLEP Prep Practice Exam

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Which of the following could be the length of a side of a square with area 81?

  1. 9

  2. 18

  3. 27

  4. 45

The correct answer is: 9

A square with an area of 81 has four equal sides, so the length of each side would be the square root of 81. Therefore, the only possible answer would be 9 since the square root of 81 is 9. The other choices would produce a different area for the square, making them incorrect options.

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