Q: The greater common factor of 18 21?

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16 over 21

Since 21 and 18 have the common factor of 3, reduce 'em to get: 21 to 18 = (3 * 7) to (3 * 6) = 7 to 6

The Greatest Common Factor of 14 and 21 is 7.

21 can not be divided by 2, ergo it can not be a common factor with 72

Highest common factor of 273 and 315 is 21.

Related questions

The Greatest Common Factor of 9, 18, 21: 3

The factors of 18 are 1, 2, 3, 6, 9, and 18. The factors of 21 are 1, 3, 7, and 21. The common factors are 1 and 3. Therefore, the least common factor (the smallest common factor) is 1. Factorizations: 18-3x3x2 21-7x3

The highest common factor of 21 and 18 is 3

1 and 3

It is 3

It is: 3

The GCF of 3, 21, and 18 is 3.

The GCF of 18, 21, and 54 is 3.

16 over 21

The GCF is 3.

The least common factor of any set of integers is 1.

You need at least two numbers to find a GCF.