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All numbers have factors. Some numbers have some of the same factors as other numbers. These are known as common factors. If you compare the lists of factors, you will see which ones are common.
Example: 30 and 42
1, 2, 3, 5, 6, 10, 15, 30
1, 2, 3, 6, 7, 14, 21, 42
The common factors are 1, 2, 3, 6
One way is to list them.
The factors of 30 are:
1, 2, 3, 5, 6, 10, 15, 30
The factors of 42 are:
1, 2, 3, 6, 7, 14, 21, 42
The common factors are:
1, 2, 3, 6
Example: 30 and 42
Factor them.
2 x 3 x 5 = 30
2 x 3 x 7 = 42
Select the common factors.
2 x 3 = 6, the GCF
Add your answer:
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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.
Is greatest common factor a synonym or antonym?
Most Common Factor, Greatest Common Factor, Highest Common Factor... all the same thing.
What is the highest common factor of 350 and 385?
There is no "common factor" of 350, to have a common factor you must have more than one number, so there is no common factor of 350.
What is the common factor of 168 and 1000?
2 is a common factor.
What is the Least common factor of 12 and 20?
The least common factor is 1 but the highest common factor is 4
How do you show work for the common factor for 63 and 72?
1,3,7,9,21,63 1,2,3,4,8,9,18,24,36,72 The factors in common are 1,3,9 The largest (greatest) common factor is 9
How do you work out the lowest common factor of 5 and 6?
The lowest common factor of two or more numbers will always be 1.
What is the greatest common factor of 128 and show the work for the greatest common factor?
You need at least two numbers to find a GCF.
What is the CF Common Factor of 24 and 48 Show your work?
There's no work to show. 24 is a factor of 48, so it has to be the GCF.
How do you work out the highest common factoer off 126?
Two or more numbers are needed to work out the highest common factor
What is the greatest common factor of 6384105?
To work out the greatest common factor, you need two numbers. In this case there is only one number so there is no GCF.
What is the greatest common factor of 16 and 24 show your work?
is 8
When factorising find the common factor?
To find the common factor when factorising, look for any common factors that can be divided evenly from all the terms in the expression. Divide each term by this common factor, and then factorise the resulting expression further if possible. This will help simplify the expression and make it easier to work with.
What is two numbers that have 6 as the greatest common factor?
6 and 12 will work.
How would you work out the common factors of 8 and 16?
Since 8 is a factor of 16, all of its factors are common.
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.
IS 180 and 231 relatively prime?
No, they have the common factor 3.No, they have the common factor 3.No, they have the common factor 3.No, they have the common factor 3.
