Answer:
6.
Explanation:
In order to solve this, we need to find the greatest common factor.
Let us now list down some factors to make 18 and 24.
18:
1 x 18
2 x 9
3 x 6
Since there are now no longer any more factors, we shall now list down factors of 24.
24:
1 x 24
2 x 12
3 x 8
4 x 6
Now that there are no more factors left to be listed, let us find the GCF (greatest common factor)
By looking at the list, you can find out that 6 is the GCF.
Hence, the answer is 6.