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What is the greatest common factor for 21 and 36?
The factors of 21 are 1, 3, 7, and 21. The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36. The factors they have in common are 1 and 3, the largest of which is 3, so 3 is the greatest common factor. Or, you can calculate the greatest common factor by looking at the prime factors. The prime factors of 21 are 3 and 7. The prime factors of 36 are 2, 2, 3, and 3. The prime factors they have in common are a single 3, so 3 is the greatest common factor.
What are the common factors of 9 and 63?
1,3 and 9 are common factors.
What are the common factors of 9 and 36?
The common factors of 9 and 36 are: 1, 3, and 9
What are the common factors of 15 and 21?
The factors of 15 are 3 and 5. The factors of 21 are 3 and 7. So the common factor is 3.
What is the GCF of 105 and 441?
The factors of 105 are:1, 3, 5, 7, 15, 21, 35, 105The factors of 441 are:1, 3, 7, 9, 21, 49, 63, 147, 441The common factors are:1, 3, 7, 21The Greatest Common Factor (GCF) is:21
