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Make a factor-tree and the look for the matches of their prime factorization... Using 6 and 8: 6......... 8 2x3.....4x2 .........2x2 so the prime factorization of 6 is 2x3 and 8 is 2x2x2 so the only match you have is two so the gcf of 6 and 8 is 2

Q: What is the greatest common factor of 6 and 8 using a factor tree?

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The factors of 48 are 1,2,3,4,6,8,12,16,24 and 48. You need another set of factors to compare them with to find a GCF.

You need at least two factor trees to find a GCF.

greatest common factor the tree way:ex:25&30 25 30 ^ ^ 5x5 5x6 5x5 are prime numbers so leave it. 5x ^ 5x2x3 2x3=6 then line them up like this:25:5x5 30:5x2x3 then make sum matches.5 and 5 are the only matches so the greatest common factors are 5

2,675 2,5,125 2,5,5,25 2,5,5,5,5

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Trees aren't necessary. The greatest common multiple of any set of numbers is always infinite.

51 3,17 81 9,9 3,3,9 3,3,3,3 The GCF is 3.

The factors of 48 are 1,2,3,4,6,8,12,16,24 and 48. You need another set of factors to compare them with to find a GCF.

You need at least two factor trees to find a GCF.

greatest common factor the tree way:ex:25&30 25 30 ^ ^ 5x5 5x6 5x5 are prime numbers so leave it. 5x ^ 5x2x3 2x3=6 then line them up like this:25:5x5 30:5x2x3 then make sum matches.5 and 5 are the only matches so the greatest common factors are 5

2,675 2,5,125 2,5,5,25 2,5,5,5,5

Find out about factors and factor trees.

All I did was make a factor tree. The GCF (Greatest Common Factor) is 5. :)

That doesn't really exist. A factor tree is a way to notate the process of finding the prime factorization of a given number. The greatest common factor, or GCF, is the largest number that can divide evenly with no remainder into a given set of numbers.

2 is a prime number, it doesn't have a factor tree. You can save time and effort by remembering that if the smaller of a pair of numbers is a factor of the larger one, it is automatically the GCF. The GCF of 2 and 36 is 2.

Since 25 is a factor of 75, it is automatically the GCF, but if you insist... 25 5,5 75 25,3 5,5,3 Select the common factors. 5 x 5 = 25, the GCF

It doesn't matter what method you use, you still need at least two numbers to find something in common.