1. How many unforgivable curses does Lord Voldemort use on Harry in the Goblet of Fire? Name them.
3 different ones, he uses a total of 5 curses
Crucio 3x (one missed him), Imperial, Avada Kedavra
2. How long does it take to brew Polyjuice Potion?
about a month
3. In the Chamber of Secrets Professor Sprout welcomes her Herbology students to which greenhouse?
4. What is Harry's number on the Quidditch team?
I didn't find a number, he is the seeker, youngest seeker for the last century
5. Who is the oldest actor to play a Hogwarts student in The Chamber of Secrets?
Christian Coulson, born 1978 played Tom Riddle when he was a student at Hogwarts
6. On what day do Harry Potter and the Dursleys arrive at the hut on the rock, on the island in the sea (SS)?
30 July 1991
7. How many times has Gilderoy Lockhart won Witch Weekly's Most-Charming-Smile Award?
8. How many years does Sirius black spend in Azkaban?
9. How many Famous Wizard cards does Ron tell Harry he has in his collection on the Hogwart's Express?
he says: "I've got about five hundred, but I haven't got Agrippa or Ptolemy"
10. What number is Dumbledore's vault at Gringott's?
11. How long has Scabbers been in the Weasley family when he becomes Ron's?
12. What number is Harry Potter's vault at Gringott's?
687 according to the movies
13. What is written where the number 12 should be on Molly Weasley's clock (COS film)?
14. How many presents does Dudley receive on his birthday (SS book)?
15. What is the license plate registration number on Mr. Weasley's Ford Anglia car (COS film)?
16. How many points are scored for a goal in Quidditch?
17. What is the exact time the Hogwart's Express leaves King's Cross station?
18. How many players are there on a Quidditch team?
19. How far back in time does Tom Riddle's diary take Harry?
20. How many flavors of Bertie Bott's Every Flavor Beans did Harry eat on the Hogwart's Express (SS book)?
he ate 8 and nibbled the end of another one = 9 flavors
21. According to the Chocolate Frog Card how old are Nicolas Flamel and his wife Perenelle Flamel?
Nicolas Flamel 665 years, Perenelle Flamel 658 years
22. What is the number on the front of the Hogwart's Express train?
23. How many eyes does Fluffy have?
24. What was Harry's room number at the Leaky Cauldron?
25. How many points did Slytherin have when Dumbledore announced the scores for the House Cup in the Sorcerer's Stone?