Question

find the greatest common factor of 15 and 30.

Explanation:

Step1: List factors of 15

Factors of 15: \(1, 3, 5, 15\)

Step2: List factors of 30

Factors of 30: \(1, 2, 3, 5, 6, 10, 15, 30\)

Step3: Find common factors

Common factors of 15 and 30: \(1, 3, 5, 15\)

Step4: Identify greatest common factor

The greatest among these is 15.

Answer:

15