Question

what is the greatest common factor of 9 and 12?

3
9
36
108

Explanation:

List the factors of 9

Using the Factors knowledge point

$$ \text{Factors of } 9 = \{1, 3, 9\} $$

List the factors of 12

Using the Factors knowledge point

$$ \text{Factors of } 12 = \{1, 2, 3, 4, 6, 12\} $$

Identify the greatest common factor

Using the Greatest Common Factor knowledge point

$$
LATEXBLOCK0
$$

Answer:

• (A) 3 (Correct answer)
• (B) 9
• (C) 36
• (D) 108