Multiples of 91:
91 / 7 = 13
91 / 13 = 7
7,13,91
There really aren't any tricks here, just trial and error
Some multiples of 156:
Because we already found the multiples of 91, and we know 156 isn't divisible by 91, let's try 13 (once again trial and error)
156/13 = 12
2,12,13,156
The answer is 13.
The GCF is 13.
The GCF is 13.The GCF is 13.
The GCF is 13.
The GCF is 13.
The GCF is 13.
The GCF of 91 and 156 is 13.The prime factorization of 91 is 7*13.The prime factorization of 156 is 2*2*3*13So the GCF is 13.
1
The GCF is 13.
The factors of 78 are: 1, 2, 3, 6, 13, 26, 39, 78 The factors of 91 are: 1, 7, 13, 91 The factors of 156 are: 1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156 The common factors are: 1, 13 The Greatest Common Factor: GCF = 13
13 is the highest common factor of 78, 91 and 156.
The GCF is 13.
The GCF is 13.