In order to find GCF, you need to find all the prime factors that go into both numbers.
450: 2 * 3 * 3 * 5 * 5
735: 3 * 5 * 7 * 7
Now, look at the prime factors that they each have in common: one 3 and one 5.
Multiply those and you have the GCF: 3 * 5 = 15
The GCF is 105.
The GCF is 735
The GCF is 15.
The GCF is 105.
The GCF is 49.
The GCF is: 105
The GCF is: 3
The GCF is 105.
105.
It is 3
The GCF of 210 and 735 is 105. This leaves you with 2 and 7. There are no further divisible numbers in common (aside from 1).
The GCF is 105.