There are 5 elements, so there are 25 = 32 subsets. 1. {} or Ø 2. {1} 3. {3} 4. {5} 5. {7} 6. {9} 7. {1,3} 8. {1,5} 9. {1,7} 10. {1,9} 11. {3,5} 12. {3,7} 13. {3,9} 14. {5,7} 15. {5,9} 16. {7,9} 17. {1,3,5} 18. {1,3,7} 19. {1,3,9} 20. {1,5,7} 21. {1,5,9} 22. {1,7,9} 23. {3,5,7} 24. {3,5,9} 25. {3,7,9} 26. {5,7,9} 27. {1,3,5,7} 28. {1,3,5,9} 29. {1,3,7,9} 30. {1,5,7,9} 31. {3,5,7,9} 32. {1,3,5,7,9} Edwin