Factor trees are ways of notating the process of finding a prime factorization, From there, you can determine the GCF.
105
35,3
7,5,3
225
75,3
25,3,3
5,5,3,3
Select the common factors.
3 x 5 = 15, the GCF.
105 35,3 7,5,3
105
105 35,3 7,5,3
The prime numbers (factors) of 105 are: 3,5,7
There are more numbers that can go into 105 than just 2 numbers. 1,3,5,7,15,21,35,105 1=105 3=35 5=21 7=15
100 + 5 110 - 5 21 x 5 525/5
They can be: 210/2 = 105
105 35,3 7,5,3
The prime factors of 105 are: 3,5,7
3*5*7 = 105
52.5 x 2 = 105
They are: 3*5*7 = 105