15=3*5
35=5*7
The gcf is 5.
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it is 9.
it is 14
It is 5
Greatest Prime Factor of 70The prime factorization of 70 is 2 X 5 X 7, so the greatest prime factor in the prime factorization of 70 is 7.
The prime factorization of 9 is 3*3. The prime factorization of 112 is 2*2*2*2*7. Therefore, they have no common factors, except for 1.