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Here are factor trees for 12 and 42:
12 - 2
- 6 - 2
- 3
42 - 2
- 21 - 3
- 7
The leaves in 12's factor tree are: 2, 2, and 3.
The leaves in 42's factor tree are: 2, 3, and 7.
The longest common sub-sequence of the leaf lists is: 2, 3.
Therefore, multiply 2 by 3 and we get that 6 is the gcf of 12 and 42.
What else can I help you with?
How do you use a factor tree to find the greatest common factor of 78 and 195?
Find out about factors and factor trees.
What is the greatest common factor of a factor tree?
You need at least two factor trees to find a GCF.
Do you do a factor rainbow for greatest common factor?
You do a factor rainbow to find a prime factorization. You compare prime factorizations to find a greatest common factor.
How do you find the greatest common factor of 64 and 114 using factor trees?
648 82 2 4 2 2 42 2 2 2 2 2 2 21142 572 3 19The only factor common to 64 and 114 is 2, so their greatest common factor is 2.
What is the greatest common factor of 400?
You need at least two numbers to find a GCF.
How do you use a factor tree to find the greatest common factor of 78 and 195?
Find out about factors and factor trees.
What is the greatest common factor of a factor tree?
You need at least two factor trees to find a GCF.
How can you find a greatest common multiple by using a factor tree?
Trees aren't necessary. The greatest common multiple of any set of numbers is always infinite.
Do factor trees always work for determining the greatest common factors?
If you construct them correctly, factor trees always work to determine the prime factorization of a number. Once you compare the prime factorizations of two or more numbers, it is relatively easy to find the greatest common factor of them from there.
Do you do a factor rainbow for greatest common factor?
You do a factor rainbow to find a prime factorization. You compare prime factorizations to find a greatest common factor.
Find the greatest common factor of 84 and 72?
The Greatest Common Factor (GCF) is: 12
How do you find the greatest common factor of 45 and 80?
The greatest common factor (GCF) is 5.
Find the greatest common factor of 16 and 20?
The greatest common factor (GCF) is 4.
Find the greatest common factor of 18 and 75?
The greatest common factor (GCF) is 3.
How do you find the greatest common factor of 154 and 418?
The greatest common factor (GCF) is 2.
How do you find the greatest common factor of 3 and 5?
The only factor they have in common is 1. It has to be the greatest.
Find a greatest common factor of 144?
There is no Greatest Common Factor (GCF) for a single number. The Greatest Common Factor (GCF) is the largest factor common to two or more given numbers.
