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86 and 154 are not relatively prime because they are both even numbers. Relatively prime numbers have no common factors other than 1, and all even numbers have 2 as a common factor.
No, 7 is not a factor of 86.
The greatest common factor of 154 and 225 is 1.
2 x 43 = 862 x 7 x 11 = 154The GCF is 2.
The GCF of 86 and 154 is 2. 86=2x43 154 = 2x7x11 Now the GCF is 2 since 43 does not occur in the prime factorization of 154 and 7 and 11 do not appear in the prime factorization of 86.
154 77,2 11,7,2
It's 24
154 / \ 2 77 / \ 7 11 154 = 2x7x11
154 77,2 11,7,2
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The GCF is 2.
86 43 x 2
Use a factor tree. 154 77,2 11,7,2
2 x 43 = 86 2 x 7 x 11 = 154 The GCF is 2.
86 2, 43 Note: 43 is a prime number
154 77,2 11,7,2 2 x 7 x 11 = 154