What is the greatest common factor of 33, 49 and 65?

To find the greatest common factor (GCF) of 33, 49, and 65, follow these steps:

1. First, find the prime factors of each number.

   • The prime factors of 33 are 3 and 11.
   • The prime factors of 49 are 7 and 7.
   • The prime factors of 65 are 5 and 13.

2. Next, identify the common prime factors.

   • In this case, there are no common prime factors among the three numbers.

3. Since there are no common prime factors, the greatest common factor of 33, 49, and 65 is 1.