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What is the greatest common factor of 12 and 25?
The greatest common factor of 12 and 25 is 1. One way to determine the greatest common factor is to find all the factors of the numbers and compare them. The factors of 12 are 1, 2, 3, 4, 6, and 12. The factors of 25 are 1, 5, and 25. The only common factor is 1. Therefore, the greatest common factor is 1. 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 12 are 2, 2, and 3. The prime factors of 25 are 5 and 5. There are no prime factors in common, so the numbers are relatively prime, which means the greatest common factor is 1.
Are 25 and 18 relatively prime?
Yes, they are. 5 is the only prime factor of 25 and 5 is not a factor of 18, so they have no prime factors in common, which is what relatively prime means.
Can two odd numbers be relatively prime?
Yes, e.g. 3 and 5 are relatively prime, 27 (33) and 25 (52) are relatively prime...
Are 25 and 65 relatively prime?
No. To be relatively prime, the only common factor they could have would be the number 1. They also have 5 as a common factor, so they are not relatively prime.
How many numbers between 20-30 are relatively prime to 25?
If you don't include 20, 25 and 30, all of the numbers in that range are relatively prime to 25.
