Can a pair of numbers have fewer than two common factors?

Anonymous

∙ 9y ago

Updated: 8/20/2019

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.

Wiki User

∙ 9y ago

What else can I help you with?

What pair of numbers do not have any common multiples?

All numbers have common multiples.

If two is not a common factor of a pair of numbers what other numbers cannot be common factors?

Even numbers.

What pair of numbers have 4 and 5 as common factors?

20 and 40 have 4 and 5 as common factors.

Give all the common prime factors each pair of numbers share?

Okay. Give us a pair of numbers.

What are the common factors for each pair of numbers 11 and 15?

The common factor is 1.

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

Which pair of numbers has 3 and 7 as common factors?

21 and 42

What are the common factors of the pair numbers 13 and 7?

' 1 ' is their only common factor. They're both prime numbers.

Common factors for each pair of numbers 9 and 25?

Just 1.

Which pair of numbers includes 4 and 5 as common factors?

20 and 40

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.

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