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

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

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

16 over 21

1 and 3

It is 3

It is: 3

The GCF is 3.

You need at least two numbers to find a GCF.

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