Answer :

Guillaume

The GCF of 30 and 49 is 1.

Steps to find GCF: Find the prime factorization of 30
30 = 2 × 3 × 5 
Find the prime factorization of 49
49 = 7 × 7 
Multiply all the common factors obtained in steps i) and ii) above to find the GCF:

GCF = 1

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