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Method 1:
Find the factors of both numbers.
13: 1;13
26: 1;2;13;26
The greatest number after the ":" (called a colon) that both numbers have in common is the GCF, or Greatest Common Factor
Method 2:
Use a factor tree (better for integers and larger numbers) to find prime factorization
13
^
1, 13
26
^
2, 13< both are prime numbers, list them.
Prime Factorization
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V
13:1x13
26:2x13
13 is the greatest common factor.
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What is the gcf of 39 and 26?
The GCF is: 13
What pairs of numbers have a gcf of 13?
13 and 26, for example.
Find the GCF of 52 and 26?
26
What is the GCF of 13 and 26?
13.13: 1, 1326: 1, 2, 13, 26It is 13
What are the highest common factors of 26 and 65?
Same as the highest common factor between 26 and 13. 13 is the remainder of the division of 65 by 26.
What is the gcf of 39 and 26?
The GCF is: 13
What is the greatest common factor of 39 26 and 78?
GCF(39, 78, 26) = 13.
What is the GCF of 39 13 and 26?
The GCF is 13.
Is 13 a GCF?
It can be. 13 is the GCF of 26 and 39.
What is the gcf for 39 and 26?
The GCF is 13.
What is the greatest common factor of 26 and 91?
26 = 2 x 1391 = 7 x 13So the GCF of 26 and 91 is 13.The GCF is 13.
Does 13 and 26 is the gcf of 13?
Yes, 13 is the GCF.
What is the greatest common factor of 13 39 and 26?
The Greatest Common Factor of 13, 39, 26 is 13.
What is the gcf of 130 and 104?
The GCF is 5.
What is a number that have a Gcf of 13?
26 and 39 have a GCF of 13.
GCF of 39 and 26?
Factors of 39: 1 3 13 39 Factors of 26: 1 2 13 26 The GCF of 39 and 26 is 13
What is the greatest common factor of 13 26 and 65?
The GCF of 13, 26, and 65 is 13. The prime factorization of 13 is 1*13. The prime factorization of 26 is 2*13 The prime factorization of 65 is 5*13 So the GCF of the set is 13.
