The GCF is 3.
What is the Greatest common factor of 21 and 84
3
It is: 3
It is 7
Since 21 is a factor of 63, it is automatically the GCF of this problem.
7 because:::1,2,7,141,3,7,21
The GCF of 21, 45, and 48 is: 3
The highest common factor of the numbers 12 and 21 is 3.
There is neither a greatest common factor nor common factors of a single number, such as 21, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor. The factors of 21 are 1, 3, 7, and 21.
The greatest common factor of the numbers 21 and 84 is 21.
It is 3 that is a common prime factor to both numbers
A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that both numbers have in common. One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them. The factors of 19 are 1 and 19. The factors of 21 are 1, 3, 7, and 21. The only common factor is 1. Therefore, the greatest common factor is 1, which means the numbers are relatively prime.