30
15,2
5,3,2
Since 60 is a factor of 360, it is automatically the GCF.
83 is prime. No tree.
5 is a common factor of 25 and 60.
To determine if (8a) is a factor of 60, we need to check if 60 can be evenly divided by (8a). Since 60 is not divisible by 8 (as (60 \div 8 = 7.5)), (8a) cannot be a factor of 60 for any value of (a) other than zero. Therefore, (8a) is not a factor of 60.
61 is already prime. It doesn't need a tree.
Because 45 is not a factor of 60.
60 30,2 15,2,2 5,3,2,2
60 30,2 15,2,2 5,3,2,2
60 30,2 15,2,2 5,3,2,2
60 30,2 15,2,2 5,3,2,2
30,2 15,2,2 5,3,2,2
45 doesn't divide into 60 evenly.
Because 45 is not a factor of 60.
45 doesn't divide into 60 evenly.
as you can obviously see the bottom of a factor tree would be the curious numbers of 2,2,3,5
use a factor tree
24 12,2 6,2,2 3,2,2,2 60 30,2 15,2,2 5,3,2,2