Respuesta :

The GCF of 18 and 39 is 3

Answer:

3

Step-by-step explanation:

Step 1) list out all the factors

18: 1, 2, 3, 6, 9, 18

39: 1, 3, 13, 39

Step 2) find the greatest factor both numbers have (Greatest Common Factor)

18: 1, 2, 3, 6, 9, 18

39: 1, 3, 13, 39

Step 4) that number is your GCF

3