1, 2, 3, 6, 9, 18.
Common factors of 18 and 252 are: 1, 2, 3, 6, 9, and 18.
You need at least two numbers to find a GCF.
Any set of factors that had 18 as a common multiple would also have multiples of 18 in common, so 18 can't be greatest. 9 and 6 have 18 as their least common multiple.
the factors of 28 from least to greatest are 1,2 and 7
The Factors are: 2, 3, 6, 9, 18, 27
126, 252, 378, 504.
1, 2, 3, 6
They are: 1, 2, 3 and 6
The factors of 33 from least to greatest are: 1, 3, 11, 33
18 is the greatest common factor.
18 :)