Which of the following shows the common factors of 12 and 15? A 1 and 2 B 2 and 3 C 1 and 3 D 3 and 4
(C):
Factors of 12 = 1, 2, 3, 4, 6, 12 Factors of 15 = 1, 3, 5, 15 Common factors of 12 and 15 = 1 and 3.