Question 561083
1. { } or ∅ 
2. {8}
3. {15}
4. {28}
5. {41}
6. {60}
7. {8,15}
8. {8,28}
9. {8,41}
10. {8,60}
11. {15,28}
12. {15,41}
13. {15,60}
14. {28,41}
15. {28,60}
16. {41,60}
17. {8,15,28}
18. {8,15,41}
19. {8,15,60}
20. {8,28,41}
21. {8,28,60}
22. {8,41,60}
23. {15,28,41}
24. {15,28,60}
25. {15,41,60}
26. {28,41,60}
27. {8,15,28,41}
28. {8,15,28,60}
29. {8,15,41,60}
30. {8,28,41,60}
31. {15,28,41,60}
32. {8,15,28,41,60}   <-- this one, the whole set, is not a "proper" subset.


Edwin</pre>