What's the GCF of 12,40, and 45

Least common factor=2 x 2 x 2 3 x 3 x 5

answer=360

GCF stands for Greatest Common Factor

12 can be divided by 1, 2, 6, 3, 4,

40 can be divided by 1, 2, 4, 10, 20, 5, 8

45 can be divided by 1, 3, 15, 9, 5

So out of all those factors the greatest factor is 2