In Harry Potter and the Sorcerer's Stone by J.K. Rowling,
Hagrid
explains the monetary system of the wizards to Harry on p. 75:
The gold coins are Galleons
17 Silver Sickles = 1 Galleon
29 Knuts = 1 Sickle.
How much change should Harry get if he buys a broomstick that costs 1 Galleon, 5 Sickles,
and 18 Knuts? He gives the cashier all the money that he has in his pocket:
2 Galleons, 4 Sickles, and 3 Knuts.
Solution to the Problem:
The answer is 15 Sickles and 14 Knuts.
Yes, I know that Harry shouldn't have given the three Knuts because he got them right back in change but he didn't really understand the monetary system, so he just gave all the change that he had in his pocket.
Correctly solved by:
| 1. K. Sengupta | Calcutta, INDIA |
| 2. John Funk | Ventura, California |
| 3. David and Judy Dixon | Bennettsville, South Carolina |
| 4. Taiya Cheney | Mountain View High School, Mountain View, Wyoming |
| 5. Hailey Granger | Mountain View High School, Mountain View, Wyoming |
| 6. Sarah Nixon | Mountain View High School, Mountain View, Wyoming |
| 7. Courtney Peterson | Mountain View High School, Mountain View, Wyoming |
| 8. Clint Lamb | Mountain View High School, Mountain View, Wyoming |
| 9. Cherish Register | Mountain View High School, Mountain View, Wyoming |
| 10. Moofie Stockings | Mountain View High School, Mountain View, Wyoming |
| 11. Tawny Bugas | Mountain View High School, Mountain View, Wyoming |
| 12. Lisa Tracy | Mountain View High School, Mountain View, Wyoming |
| 13. Nicole Mortimer | Mountain View High School, Mountain View, Wyoming |
| 14. Wynston Anglen | Mountain View High School, Mountain View, Wyoming |
| 15. Ashly Lacy | Mountain View High School, Mountain View, Wyoming |
| 16. Tyson Foianini | Mountain View High School, Mountain View, Wyoming |
| 17. Cody Wease | Mountain View High School, Mountain View, Wyoming |
| 18. Carson Revelli | Mountain View High School, Mountain View, Wyoming |
| 19. Kaycie Rees | Mountain View High School, Mountain View, Wyoming |
| 20. Mike Woody | Mountain View High School, Mountain View, Wyoming |
| 21. Shenay Smith | Mountain View High School, Mountain View, Wyoming |
| 22. Skye Williams | Mountain View High School, Mountain View, Wyoming |
| 23. Morgan Vercimak | Mountain View High School, Mountain View, Wyoming |
| 24. Nick Heltz | Mountain View High School, Mountain View, Wyoming |
| 25. Kallie Gross | Mountain View High School, Mountain View, Wyoming |
| 26. Chelsea Sidwell | Mountain View High School, Mountain View, Wyoming |
| 27. Cody Oliver | Mountain View High School, Mountain View, Wyoming |
| 28. Halie Gardner | Mountain View High School, Mountain View, Wyoming |
| 29. Zachary Gray | Mountain View High School, Mountain View, Wyoming |
| 30. Joshua Largent | Mountain View High School, Mountain View, Wyoming |
| 31. Cassie Henry | Mountain View High School, Mountain View, Wyoming |
| 32. Dallas Homan | Mountain View High School, Mountain View, Wyoming |
| 33. Bethany Rinker | Mountain View High School, Mountain View, Wyoming |
| 34. Parker Vercimak | Mountain View High School, Mountain View, Wyoming |
| 35. Brooke Castillon | Mountain View High School, Mountain View, Wyoming |
| 36. Valerie Taylor | Mountain View High School, Mountain View, Wyoming |
| 37. Les Walker | Ventura, California |