Answer:
1. 1,3,9,27
2. 1,2,4,5,10,20
3. lahat
4. 1,3,5,9,15,45
5. 1,3,8,32,64
6. 1,2,9,18
7. 1,2,7,8,28,56
8. lahat
9. lahat
10. lahat
