The GCF of 18 and 35 is 1.
The GCF of 21 and 90 is 3.
3
You do not. To have a greatest common factor, you need two or more numbers. A common factor is a factor that two or more number have in common. However, the prime factorization of all the numbers will help you find the greatest common factor. The greatest common factor will be the prime factors they have in common multiplied together. Example: The prime factors of 45 are 3, 3, and 5. The prime factors of 60 are 2, 2, 3, and 5. The common prime factors are 3 and 5, so the greatest common factor is 3 x 5 = 15.
The greatest common factor of 30 and 39 is 3.
The greatest common factor of 3 and 63 is 3.
The greatest common factor of 24 and 57 is 3.
The greatest common factor of 3 and 57 is 3
The greatest common factor of 3 and 23 is 1
The Greatest Common Factor (GCF) is: 3
1 is their greatest common factor.
The Greatest Common Factor of 60, 21, 9: 3
The greatest common factor of 39 and 18 is definitely 3.