240 and 240,000
You need at least two numbers to find a GCF.
The GCF of 6 and 10 is 2.
4 and 9 have a GCF of 1
10,20
21 and 42.
30 and 60
15 and 30
the two smallest numbers are 49 and 14
20 and 100.GCF is 20, and LCM is 100.
12 and 66
4 and 8.
12 and 216