Question

find the greatest common factor of 15 and 30.

Explanation:

Step1: List factors of 15

$1, 3, 5, 15$

Step2: List factors of 30

$1, 2, 3, 5, 6, 10, 15, 30$

Step3: Identify common factors

$1, 3, 5, 15$

Step4: Select the largest common factor

The maximum value in the common factors is 15.

Answer:

15