The common factors of 21 and 42 are 3, 7 and 21. The greatest common factor (GCF) is 21.
The common factors are: 1, 21 and 21 and 2 are common factors of 10 and 14
The greatest common factor is 3
The GCF of 10 and 21 is 1. One way to approach this is to look at the difference between 10 and 21, which is 11. The greatest common factor of two numbers cannot be larger than the difference between the two numbers and must be a factor of the difference. The greatest common factor cannot be larger than the smallest number, so it cannot be 11. The only other factor of 11 is 1, so the greatest common factor is 1. Another way to determine the greatest common factor is to find all the factors of the numbers and compare them. The factors of 10 are 1, 2, 5, and 10. The factors of 21 are 1, 3, 7, and 21. The only common factor is 1. Therefore, the greatest common factor is 1, which means the numbers are relatively prime. The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factors of 10 are 2 and 5. The prime factors of 21 are 3 and 7. There are no prime factors in common, so the numbers are relatively prime, which means the greatest common factor is 1.
The factors of 21 are 1, 3, 7, and 21. For them to be common, they need to be compared to another set of factors.
The factors of 21 are 1, 3, 7, and 21. The factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30. The common factors are 1 and 3. The greatest common factor is 3.
Since 7 is a factor of 21, it is automatically the GCF and all of its factors are common.
The greatest common factor is 21.
The Greatest Common Factor (GCF) is: 7
The Greatest Common Factor (GCF) is: 3
The Greatest Common Factor (GCF) is: 7
The factors of 14 and 21 are: 14: 1,2,7,14 21:1,3,7,21 The common factors are:1 and 7. Therefore 7 is the greatest common factor (GCF)