Answer: 1 ✔
Explanation:
The factors of 21 are: 1, 3, 7, 21
The factors of 65 are: 1, 5, 13, 65
Then the greatest common factor is 1.
They both contain a one in their factors so the GCF for both is 1.
Answer:
1
21 = 3*7
65 = 5*13
CGF: to find the greatest common factor, multiply those factors both numbers have in common
GCF :1 since there are no factors in common
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