Which of the following is not a factor of 15

- Which of the following is not a factor of 150
- Which of the following numbers is not a factor of 15
- Which of the following numbers is not a factor of 156
- Which of the following number is not a factor of 150
- Which one of the following is not a factor of 15
- Which of the following is not a factor of x3 15x2 14x
- Which of the following is not a factor of 12a 2b 15ab 2
- Which one of the following numbers is not a factor of 15
- Which of the following is not a common factor of 10ab and 15a
- Which is not a factor of 15
- Which number is not a factor of 15
- Which number is not a factor of 150
- Which choice is not a factor of 15