Even numbers.
An HCF is the product of any common prime factors of two numbers. If two numbers have no common prime factors, then the HCF will be 1. For example, 10 and 21. The prime factors are 2x5 and 3x7. There is nothing in common, and so the HCF of 10 and 21 is 1. Two consecutive numbers will always have the HCF of 1.
No. If two numbers are coprime, they must have no common factors.
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.
'Relatively Prime' simply means that two numbers have no common factors except 1 between each other. For example, two prime numbers would have no common factors between them. i.e., look at 3 and 10. There are no common factors between these 2 numbers.
Common factors are factors that are the same for two or more numbers.
The greatest of the common factors of two or more numbers is the GCF
They are called common factors when they are the same for two or more numbers. They are factors that are common to both number.
All nonzero numbers have factors. Some numbers have some of the same factors as other numbers. These are known as common factors. Pick two numbers. Write down their factors. The numbers that appear on both lists are common factors.
You need at least two numbers to find a GCF.
Common Factors
There are no common factors of 6 because there cannot be common factors without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. Thus, there cannot be a least common factor. In general, the least common factor of two numbers is 1.
The least common factor for two numbers is always one. The least common multiple for two numbers which have no common factors greater than one is their product.
You need at least two numbers to find factors in common.
To have common factors there must be at least two numbers.
The common factors of the two numbers are: 1, 2
If the two numbers have no common prime factors, the LCM will be the product of the numbers.