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What is GCF for 9 and 13?

Answer 1

Noah Archer

GCF of #9# and #13# is #1#.

The factors of #9# are #3xx3#, and

as #13# is a prime number, its only factor is #13#.

Observe that they have nothing in common.

These numbers are referred to as relatively primes or coprimes.

GCF of such numbers is always #1#.

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Answer 2

Levi Adams

So GCF (greatest common factor) is 1

Using prime numbers as factors: also including 1

#color(blue)(ul("Very important fact;")" 1 is not a prime numbers")#

#color(brown)("The only factors of a prime number is 1 and the number itself")#

#color(white)(1)9->color(red)(1)xx3xx3# #13->color(red)(1)color(white)(xx3xx3)xx13color(brown)( larr" Thus 13 is a prime number")#

The only common factor is 1

So GCF (greatest common factor) is 1

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Answer 3

Gianna Caruso

The greatest common factor (GCF) of 9 and 13 is 1.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.