Best Answer

The GCF of 21 and 25 is 1

Definition: 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 the numbers have in common.

Method:

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 21 are 1, 3, 7, and 21.

The factors of 25 are 1, 5, and 25.

The only common factor is 1. Therefore, the greatest common factor is 1, which means the numbers are relatively prime.

The greatest common factor of 21 and 25, is 1.

The factors of 21 are: 1, 3, 7, 21

The factors of 25 are: 1, 5, 25

The common factors are: 1

The GCF is 1.

Q: What is the greatest common factor of 21 and 25?

Write your answer...

Submit

Still have questions?

Continue Learning about Basic Math

The GCF is of 21, 42, and 84 is 21.

The greatest common factor of 25 and 175 is 25.

The greatest common factor of 25 and 34 is one.

The greatest common factor of 25 and 80 is 5.

25 is the greatest common factor of 75 and 25. 3 x 25 = 75.

Related questions

The GCF is 1.

The greatest common factor of 20, 21, and 25 is 1. Although 20 and 25 can be divisible by 5, 21 can not. Therefore, the only common factor between these three numbers is 1 and it's the greatest one as well.

The GCF is of 21, 42, and 84 is 21.

The GCF is 1.

The GCF is 1.

The greatest common factor of 25 and 100 is 25.

-- The greatest factor of 21 is 21 .-- The greatest factor of 12 is 12 .-- 1, 2, and 3 are factors of both 21 and 12 .-- The greatest common ('same for both') factor is 3 .

The greatest common factor (GCF) is 25.

The greatest common factor of 25 and 175 is 25.

The greatest common factor (GCF) is 25.

The greatest common factor of 25 and 76 is 1.

The greatest common factor of 25 and 34 is one.