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The GCF is 7.
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Highest common factors of 28 and 21 of the pair?
The GCF is 7.
Highest common factors of 35 and 45 of the pair?
There can only be one "highest".Here's how to find it:Factors of 35: 1, 5, 7, and 35Factors of 45: 1, 3, 5, 9, 15, and 45Common factors: 1 and 5Highest common factor ===> 5
What pair of numbers have 4 and 5 as common factors?
20 and 40 have 4 and 5 as common factors.
What are the common factors of 27 and 28?
27 and 28 have no common factors other than one. Any pair of consecutive integers is coprime, and such a pair's only common factor is 1.
What are the common factors for each pair of numbers 11 and 15?
The common factor is 1.
Which pair of numbers has 3 and 7 as common factors?
21 and 42
What pair of numbers have 4 and 6 as common factors?
12 and 24
Which pair of numbers have 4 and 6 for the common factors?
12 and 24
What are the common factors of each pair of 16 and 30?
1 and 2
How are parentheses used in grouping factors?
It is common to group factors in pairs with parentheses surrounding each pair.
What pair of numbers do not have any common multiples?
All numbers have common multiples.
Can a pair of numbers have fewer than two common factors?
Yes, a pair of numbers can have fewer than two common factors. This only happens when the numbers are co-prime -- that is, when the numbers have only one common factor. In that case, the common factor is always 1.
