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Q: What is the greatest common factor of two composite mumbers is 1?

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8 and 16

Not necessarily.

The greatest common factor of a prime number & a composite number is 1 if the composite number is not divisible by the prime number. 81(composite number) is not divisible by 29(prime number) so, gcf(29,81) = 1.

15 and 16

8 and 16

Yes.

24, 25 and 26

8 and 16

25 and 36

8 and 16

No.

4, 9 and 25

The greatest common factor of a prime and a composite number is 1 if the composite number is not divisible by the prime number. 37 is a prime number and 50 is a composite number. Also, 50 is not divisible by 37 therefore GCF = 1.

Composite. All whole numbers ending in zero are composite.

8 and 16, among others.

25 and 32

25, 36, 49

Because 3 is prime, it has no factors other than 1 and 3. 14 is composite, having the factors 1, 2, 7, and 14. 1 is the greatest common factor, and the only common factor, of 14 and 3.

No for example the GCF of 24 and 36 is 12 which is a composite number

Yes as for example 34 and 45

4 and 24, 12 and 16

No, that's not true.

That would be 4, and 2; greatest common factor is 2.

The greatest common factor (GCF) is 7m.