what is the gcf of 42 and 63

3 answers

what iste geatest common factor of 42 an 63
the gcf is 7(im doing this in school too)
Let's look at the factors of these numbers.

42: 1, 42, 2, 21, 3, 14, 6, 7

63: 1, 63, 3, 21, 7, 9

Which is the largest number that apears in both lists of factors?