College Math CLEP Prep Practice Exam

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What is the common factor of 16 and 24?

  1. 4

  2. 8

  3. 16

  4. 24

The correct answer is: 4

The common factor of 16 and 24 is 4 because it is the largest number that can evenly divide into both 16 and 24. Option B, 8, is only a factor of 16 but not 24. Option C, 16, is a factor of both numbers but not the "common" factor. And option D, 24, is the greatest common denominator of the two numbers, but not the common factor. Therefore, the correct answer is A.

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