B. Write the letter of the correct answer in your notebook.
1. The common factors of 12, 30 and 42 are
a. 1, 2, 3
b. 2,3,6
c. 2, 4, 8
d. 5, 10, 15
2. The greatest common factor of 24 and 32 is
b. 4
c. 6
d. 8
a. 2
3. The common multiples of 6 and 4 are
b. 4, 6, 8
a. 2, 3, 4
d. 12, 24, 36
c. 8, 12, 16​