find the greatest common factor of 35 and 20.

Explanation:

Step1: List factors of 35

The factors of 35 are 1, 5, 7, 35.

Step2: List factors of 20

The factors of 20 are 1, 2, 4, 5, 10, 20.

Step3: Find common factors

The common factors of 35 and 20 are 1, 5.

Step4: Determine GCF

The greatest among them is 5.

Answer:

5