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The GCF is 7.
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∙ 8y ago
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Which pair of numbers has 3 and 7 as common factors?
21 and 42
What are the highest common factors of 42 and 63?
The greatest common factor is 21
What is the greatest common factor of 21 and 27?
The greatest common factor of 21 and 27 is 3 because that is the highest number that goes into 21 and 27. To find the highest common factor of two numbers, you first have to break them down into their prime factors. In this case, the prime factors of 21 and 27 are: 21 = 3x7 27 = 3x3x3 The next step is to identify any common factors. In this case, the only common prime factor is 3. Thus, the highest common factor of 21 and 27 is 3.
What is the highest common factor of 49 and 21?
The factors of 21 and 1,3,7, and 21Now since 21 is not a factor of 49, but 7 is we can say right away the GCF is 7.
What is the greatest common factor of 21 and 99?
The greatest common factor of 21 and 99 is 3. 21's factors are 1,3,and 7 99's factors are 1,3,9,11 33 (there may be more factors of 99). The highest factor that both number have in common are 3.
What are the highest common factors of 21 and 24?
Factors of 21: 1, 3, 7, and 21Factors of 24: 1, 2, 3, 4, 6, 8, 12, and 24The common factors are: 1 and 3 .If you're looking for the "highest", there can only be one of those.It's 3.
What are all the common factors of 84 and 105 and the GCF of each pair?
The factors of 84 are: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84 The factors of 105 are: 1, 3, 5, 7, 15, 21, 35, 105 The common factors are: 1, 3, 7, 21 The Greatest Common Factor: GCF = 21
What are the factors of 14 21 35 and 42?
The highest common factor of all four numbers is 7
What pair of numbers is relatively prime 10 and 21 12 and 54 15 and 27 21 and 39?
I suggest factoring each pair of numbers, and checking whether they have, or don't have, common factors. A pair of numbers is said to be "relatively prime" if they have no common factors (their greatest common factor is 1). For larger numbers, Euclid's algorithm could be used, but for such small numbers, factoring is probably faster.
What are the common factors of 21 and 51?
The common factors of 21 and 51 are: 1 and 3
What is the least common factor of 16 and 21?
The factors of 16 are 1, 2, 4, 8, and 16. The factors of 21 are 1, 3, 7, and 21. The only common factor is 1; they are relatively prime. The least (or lowest) common factor is 1. The greatest (or highest) common factor is 1.
What are the greatest common factors of 210 and 214?
The GCF of 210 and 231 is 21. The factors of 231 are: 1, 3, 7, 11, 21, 33, 77 and 231 The factors of 210 are: 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105 and 210 The highest common factor is 21
