What is the greatest common factor of 21 49 and 63?

Answer 1

To find the greatest common factor (GCF) of 21, 49, and 63, we first need to find the prime factorization of each number. The prime factorization of 21 is 3 x 7, 49 is 7 x 7, and 63 is 3 x 3 x 7. The GCF is the product of the common prime factors raised to the lowest power they appear in all the numbers, which in this case is 7. Therefore, the GCF of 21, 49, and 63 is 7.

Answer 2

The GCF of 21, 49 and 63 is 7.
The factors of 21 are: 1, 3, 7, 21

The factors of 49 are: 1, 7, 49

The factors of 63 are: 1, 3, 7, 9, 21, 63

The common factors are: 1, 7

• The Greatest Common Factor (GCF) is: 7

GCF = 7

Answer 3

For any set of numbers, there can be only one GCF. In this case, it is 7.

Answer 4

The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself.

Answer 5

GCF(21, 49, 63) = 7

Answer 6

7.

Answer 7

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Answer 8

he GCF of 21, 49 and 63 is 7.

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

The factors of 49 are: 1, 7, 49

The factors of 63 are: 1, 3, 7, 9, 21, 63

The common factors are: 1, 7

The Greatest Common Factor (GCF) is: 7

Answer 9

7

Answer 10

7