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Q: What is the greatest greatest common factor of 15 and 20 using prime factors?

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The greatest common factor is the greatest number that divides two numbers. The procedure for finding the greatest common factor is:List the prime factors of each number.Multiply together all the factors that both the numbers have in common. If there are no common prime factors, the GCF is 1.In this case, the prime factors of 87 are 3 and 29 because 3*29 = 87 and 3 and 29 are prime.andthe prime factor of 3 is 3 because 3 is prime.Therefore, the common factors are a single prime = 3Therefore, the greatest common factor of 83 and 3 is 3.

The GCF of 8, 10, and 12 is 2. The greatest common factor (GCF) is the greatest factor that divides two numbers. step1: find the prime factors of each number prime factors of 8: 2 X 2 X 2 prime factors of 10: 2 X 5 prime factors of 20: 2 X 2 X 5 step2: multiply the common factors in the both numbers there is only number 2 is in common. GCF = 2

37 is already prime. 3 x 31 = 93 No common prime factors, the GCF is 1.

Answer:The common factors of 60 and 200 are 1, 2, 4, 5, 10, and 20.The greatest common factor of 60 and 200 is 20.Definition: A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that all the numbers have in common.Method:One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.The factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60.The factors of 200 are 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, and 200.The common factors are 1, 2, 4, 5, 10, and 20. Therefore, the greatest common factor is 20.The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together.The prime factors of 60 are 2, 2, 3, and 5.The prime factors of 200 are 2, 2, 2, 5, and 5.The prime factors in common are 2, 2, and 5, so the greatest common factor is 2 x 2 x 5 = 20.

The prime factors of 60 are 2, 2, 3, and 5. The greatest common factor is 6, which accounts for a 2 and 3 from the prime factors of 60. The remaining numbers are 2 and 5. So, multiply 2x6 = 12 and 5x6=30 to come up with two numbers that have greatest common factor of 6 and least common multiple of 60.

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You do not necessarily need the common prime factors when finding the greatest common factor, but with large numbers or numbers for which you cannot easily determine all the factors, using prime factorization to determine the greatest common factor is the easiest method. The greatest common factor can then be determined by multiplying the common prime factors together. For example, when trying to find the greatest common factor of 2144 and 5672, finding all their possible factors to compare could be difficult. So, it is easier to find their prime factors, determine the prime factors they have in common, and then multiply the common prime factors to get the greatest common factor. For descriptions and examples of finding the greatest common factor, see the "Related Questions" links below.

The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factors of 35 are 5 and 7. The prime factors of 42 are 2, 3, and 7. The common prime factors are a single 7, so the greatest common factor is 7.

The factors of 22 are 1, 2, 11, and 22. The factors of 55 are 1, 5, 11, and 55. The common factors are 1 and 11. Therefore, the greatest common factor is 11. The greatest common factor can also be find by determining the prime factors and multiplying the common prime factors together. The prime factors of 22 are 2 and 11. The prime factors of 55 are 5 and 11. The common prime factors are a single 11, so the greatest common factor is 11.

The greatest prime factor of 40 is 5. The greatest prime factor of 63 is 7. They do not have any prime factors in common.

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The greatest common prime factor of 10 and 20 is 5.

3 is a factor of 51, and 3 is also the largest factor of itself, so 3 is the greatest common factor. The factors of 3 are 1 and 3. The factors of 51 are 1, 3, 17, and 51. The common factors are 1 and 3. Therefore, the greatest common factor is 3. The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factor of 3 is 3. The prime factors of 51 are 3 and 17. The common prime factors are a single 3, so the greatest common factor is 3.

Because both numbers are prime numbers, the only common factor they have is 1. Therefore, 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 5 are 1 and 5. The factors of 23 are 1 and 23. 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 factor of 5 is 5. The prime factor of 23 is 23. There are no prime factors in common, so the numbers are relatively prime, which means the greatest common factor is 1.

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.

1 One way to determine the greatest common factor is to find all the factors of the numbers and compare them. The factors of 289 are 1, 17, and 289. The factors of 589 are 1, 19, 31, and 589. The common factors are 1. Therefore, the greatest common factor is 1; they 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 289 are 17 and 17. The prime factors of 589 are 19 and 31. There are no prime factors in common, which means they are relatively prime, so the greatest common factor is 1.

Since 3 is a prime number, either it or 1 is the greatest common factor. Since 3 is not a factor of 14, 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 3 are 1 and 3. The factors of 14 are 1, 2, 7, and 14. The only common factor is 1. Therefore, the greatest common factor is 1. The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factor of 3 is 3. The prime factors of 14 are 2 and 7. There are no prime factors in common, so the numbers are relatively prime, which means the greatest common factor is 1. Summary of results: The common factor is 1. The greatest common factor is 1. The numbers are relatively prime.

There is always a common factor. If there are no common prime factors, the GCF is 1.

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