What are the common factors of 42 and 70

What are the common factors of 42 and 70


1.2.7.14



The common factors of 42 and 16 are (), and the common factors of 84 and 21 are ()


1.2
1.3.7.21



Common factor of 45 and 30


Factor of 45: 1,3,5,9,15,45
Factor of 30: 1,2,3,5,6,10,15,30
So the common factors are: 1,3,5,15