| | | | | | | | | | | 1. | 2. | 3. | 4. | 5. | 6. | 7. | 8. | 9. | 10. | 11. | 12. | 13. | 14. | 15. | 16. | 17. | 18. | 19. | 20. | | * | | * 1 4 = + 5 | | * 5 10 = + 10 | * 11 15 = + 20 | * 16 = + 30 | | | | | | | |