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Q: Which pair of composite numbers has GCF of 1?

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The GCF of all the composite numbers under 100 is 1. For e.g 4 & 9 are composite numbers & their GCF is 1, so if we take other composite numbers along with 4 & 9 the GCF will be 1.

4 and 9 have a GCF of 1

Yes.

3 and 7?

Any pair of prime numbers as for example 19 and 23

5 and 7

Any two composite numbers who do not share the same prime factors.15 = 5x322 = 11x2So 15 and 22 have a GCF of 1

25 and 36

4 and 9 hope it helps!! : )

No.

The pair of numbers whose GCF is 1 and LCM is 36 is 9 and 4. The numbers should be greater than their GCF and less than their LCM.

numbers which are co prime have a GCF as 1 For example *2,3 *37,47 *23,24

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