Dumbledore's Defeat of Grindelwald

Dumbledore's Defeat of Grindelwald trivia questions

1. In what year did Dumbledore defeat Grindelwald in their famous duel?
2. Which spell did Dumbledore famously use against Grindelwald during their duel?
3. What was Grindelwald's primary goal that Dumbledore opposed?
4. Before their duel, what was the nature of Dumbledore and Grindelwald's relationship?
5. Where was Grindelwald imprisoned after his defeat by Dumbledore?
6. What symbol did Grindelwald adopt for his radical wizarding movement?
7. Which Deathly Hallow did Grindelwald possess that Dumbledore also sought?
8. What false claim did Dumbledore make publicly about Grindelwald's defeat?
9. How many years passed between Grindelwald's rise and his final defeat?
10. What was Grindelwald's real name before he became known by that alias?