Which is not a factor of 20

- Which number is not a factor of 20
- Which is not a factor pair of 200
- Which choice is not a factor of 20
- Which number below is not a factor of 20
- Which of the following is not a factor of 20
- Which of the following is not a factor of 200
- Which of the following is not a factor of 2013
- Which of the following is not a factor of 207
- Which of the following numbers is not a factor of 204
- Which of the following number is not a factor of 20
- Which of the following values is not a factor of 20
- What is not a factor of 204
- What is not a factor of 20 and 28
- Which number is a factor of 20 but not a multiple
- Which of the following is not a common factor of 8xy and 20x