The GCF of 11 and 15 is 1.
Since 11 is prime, it only has 11 and 1 as factors. Since 15 cannot be evenly divide by 11, the greatest common factor (GCF) is 1.
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1 is the greatest and only common factor of 15 and 38. The prime factorization of 15 is 3*5. The prime factorization of 38 is 2*19
The Greatest common factor of 45 and 210 is 15.The prime factorization of 45 is 3*3*5The prime factorization of 210 is 2*3*5*7The greatest common factor is 3*5 = 15
15. 150 = 10 x 15, 165 = 11 x 15 and 10 and 11 are co-prime
The GCF of 15, 25, and 30 is 5.The prime factorization of 15 is 3*5.The prime factorization of 25 is 5*5The prime factorization of 30 is 2*3*5So the GCF of 15, 25, and 30 is 5.
The greatest common factor of 15 and 105 is 15.