Answer:
Explanation:
Let's write the factors of all the numbers given.
- => 27 = 1, 3, 9, 27
- => 17 = 1, 17
- => 30 = 1, 2, 3, 5, 6, 10, 15, 30
We can see that 1 is the only factor of all the three numbers given.
Conclusion:
Therefore, 1 is the GCF.
Hoped this helped.