Answer:
1
Explanation:
The GCF of 24 and 97 can be obtained like this: 
-  The factors of 24 are 24, 12, 8, 6, 4, 3, 2, 1. 
- The factors of 97 are 97, 1. 
- The common factors of 24 and 97 are 1, intersecting the two sets above. 
- In the intersection factors of 24 factors of 97, the greatest element is 1. 
- Therefore, the greatest common factor of 24 and 97 is 1.