The GCF is 3.
Chat with our AI personalities
The answer is 3. Factor out each term to get: 39 = 3 x 13 87 = 3 x 29 The GCF is 3 since that term is common for these terms. In other words, 39 and 87 have the common factor of 3.
GCF of a and b is a if b is divisible by a.87 is divisible by 29 so, GCF(29,87) = 29.
Since 39 is a factor of 78, it is automatically the GCF.
The GCF is 24.
The GCF is 13.