You need at least two numbers to find a GCF.
The GCF is 3.
The greatest common factor of 18 21 and 42 is 3.
yes it is because 3 goes into 18 6 times - 3, 6, 9, 12, 15, 18, 21, 24, 27, 30
The GCF of 21 and 90 is 3.
The greatest common factor of 18 and 21 is 3.
The Greatest Common Factor of 9, 18, 21: 3
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.
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
1 and 3
It is: 3
It is 3
Factors or 18: 1, 2, 3, 6, 9, 18 Factors of 21: 1, 3, 7, 21 They both have a factor of 3
The GCF is 3.
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