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What is the greatest common factor of 20 and 30 listing factors for each number in order from least to greatest Report each list and then the greatest common factor?
Wiki User
∙ 14y ago
20: Prime = 2 x 2 x 5, composites 4 and 10;
30: Prime = 2 x 3 x 5, composites 6, 10 & 15.
GCF = 2 x 5 ie 10.
Wiki User
∙ 14y ago
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Why does the listing method always works to find the greatest common factor?
The greatest common factor of two numbers has to show up on the lists of factors of both numbers.
What is the difference between common factors and greatest common factors?
The greatest common factor is the largest of the common factors.
What are the common factors and greatest common factor of 35?
Short answer: There are none. There is neither a greatest common factor nor common factors of a single number, such as 35, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor. Examples: The common factors of 10 and 35 are 1 and 5; the greatest common factor is 5. The common factors of 21 and 35 are 1 and 7; the greatest common factor is 7. The common factors of 35 and 45 are 1 and 5; the greatest common factor is 5. The common factors of 35 and 49 are 1 and 7; the greatest common factor is 7. The common factors of 35 and 61 are only 1; the greatest common factor is 1.
What are the greatest common factors of 7 42 70?
Greatest common factors of 7 42 & 70 is 7.
What are the common factors and greatest common factor of 34?
Short answer: There are none. There is neither a greatest common factor nor common factors of a single number, such as 34, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor. Examples: The common factors of 12 and 34 are 1 and 2; the greatest common factor is 2. The common factors of 34 and 40 are 1 and 2; the greatest common factor is 2. The common factors of 34 and 85 are 1 and 17; the greatest common factor is 17. The common factors of 34 and 91 are only 1; the greatest common factor is 1.
What is the greatest common factors for 125 and 50 by listing the factors?
The factors of 50 are: 1, 2, 5, 10, 25, 50.The factors of 125 are: 1, 5, 25, 125.The common factors are: 1, 5, 25The Greatest Common Factor (GCF) is: 25
Why does the listing method always works to find the greatest common factor?
The greatest common factor of two numbers has to show up on the lists of factors of both numbers.
What is the greatest common factor of 63 and 49 using listing method?
The factors of 49 are:1, 7, 49The factors of 63 are:1, 3, 7, 9, 21, 63The Greatest Common Factor:GCF = 7
What is the difference between common factors and greatest common factors?
The greatest common factor is the largest of the common factors.
How do you find the greatest common factor using listing method of 18 and 20?
The factors of 18 are:1, 2, 3, 6, 9, 18The factors of 20 are:1, 2, 4, 5, 10, 20The Greatest Common Factor:GCF = 2
What are the common factors and greatest common factors of 12 and 15?
The common factors are 1 and 3. The greatest of these is 3.
What is the greatest common factor of 72 and 136 listing the factors?
The factors of 72 are: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36 The factors of 136 are: 1, 2, 4, 8, 17, 34, 68, 136 The Greatest Common Factor is 8.
What are the common factors and the greatest common factors for 15 and 40?
The common factors are: 1, 5 The Greatest Common Factor (GCF) is: 5
What are the greatest common factors of 990 and 1540?
What are the greatest common factors of 990 and 1540
What are the common factors and greatest common factor of 10 and 20?
1,2,5,10 are the common factors, and the Greatest Common Factor is 10.
What is the greatest common factor 504 and 336?
The greatest common factor between 504 and 336 is 168. You would find this by listing all the factors of 504 and 336 and choosing the highest one that would divide them evenly with no remainders.
What are the greatest common factors of 18 and26?
The common factors are: 1, 2 The Greatest Common Factor: 2
