By comparing its factors with the factors of another number.
Example: 30 and 42
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
to find a factor of a number you have to 1. find the hcf (highest common factor) 2. find how many times the hcf goes into your number AND THAT IS YOUR ANSWER!
The greatest common factor (or GCF) is the highest number that can divide into aanother number, and not have a decimal (whole number).
You need more than one number to find a GCF.
When they are trying to reduce fractions.
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.
You can't find the greatest common factor of 850 unless you have another number with it... For example: What is the greatest common factor of 850 and 425? Then, the answer would be: 425, since 425*2=850.The smallest factor of 850 is 1, but you need at least two numbers to find a GCF.
There cannot be a greatest common factor of just one number. To be common there need to be at least two numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.
There cannot be a greatest common factor of just one number. To be common there need to be at least two numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.
There cannot be a greatest common factor of just one number. To be common there need to be at least two numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.
There cannot be a greatest common factor (GCF) of just one number. To be common there need to be at least two numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.
The lowest common factor of any set of whole numbers would be 1. The way to find the least common factor would be to list all the factors of each number, determine which factors are common to all numbers, and then choose the smallest. However, that will be 1.By remembering that the least common factor of any set of integers is 1.All you have to do is memorize this: The least common factor of any set of nonzero positive integers is 1.
There cannot be a greatest common factor (GCF) of just one number. To be common there need to be at least two numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.