College Math CLEP Prep Practice Exam

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What is the square root of 81?

  1. 6

  2. 7

  3. 8

  4. 9

The correct answer is: 9

The square root of a number is a number that, when multiplied by itself, gives the original number. So, in this case, the square root of 81 is a number that, when multiplied by itself, equals 81. Out of the given options, only 9 satisfies this condition. A, B, and C are incorrect as their products do not equal 81. Additionally, it is important to note that in mathematics, we typically use the positive square root, so the answer would not be -9. Therefore, D is the correct answer.

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