1.
Which of the following numbers is not a factor of 68?
2.
Which of tfie following numbers is not a factor of 36?
3.
Which of the following numbers is not a factor of 24?
4.
Which of the following numbers is not a factor of 15?
5.
Which of the following number is not a factor of 21?
6.
Which of the following number is not a multiple of 27?
7.
Which of the following numbers is not a factor of 12?
8.
Which of the following numbers is not a factor of 20?
9.
Which of the following number is not a factor of 18?
10.
Which of the following number is not a multiple of 6?