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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 is the HCF of 21 77 84?
The Highest Common Factor (HCF) of 21, 77, and 84 is 7. To find the HCF, you need to identify the common factors of the numbers and determine the highest one they all share. In this case, the factors of 21 are 1, 3, 7, 21; the factors of 77 are 1, 7, 11, 77; and the factors of 84 are 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84. The highest common factor among them is 7.
What is the HCF of 63 and 21?
The Highest Common Factor (HCF) of 63 and 21 is 21. To find the HCF, you can list the factors of both numbers and find the highest number that divides both evenly. In this case, the factors of 63 are 1, 3, 7, 9, 21, and 63, while the factors of 21 are 1, 3, 7, and 21. The highest number that appears in both lists is 21, making it the HCF.
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 is the highest common factor of 189 and 147?
Well, darling, the highest common factor of 189 and 147 is 21. It's like finding the perfect pair of shoes that go with every outfit - simple and practical. So, go ahead and strut your stuff knowing you've got that HCF on lock!
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.
