Quidditch
Name all the Quidditch balls (and how many of each).
Name all unforgivable curses.
What are the Imperius Curse (Imperio), the Cruciatus Curse (Crucio), and the Killing Curse (Avada Kedavra)?
Name the Head of each Hogwarts House (and the house they are the head of).
Who are Minerva McGonagall (Gryffindor), Pomona Sprout (Hufflepuff), Filius Flitwick (Ravenclaw), and Severus Snape (Slytherin)?
What is the date of Lily and James Potter's death?
October 31, 1981.
In PS, Harry talks to a snake at the zoo, who speaks to Harry only once. What does the snake say?
Brazil here I come... Thanksss amigo. "As the snake slid swiftly past him, Harry could have sworn a low hissing voice said, 'Brazil here I come... Thanksss, amigo." - PS, chapter 2, page 28
The number of points received after catching the Golden Snitch.
What is 150?
The countercurse to Lumos.
What is Nox?
Remus Lupin's middle name.
What is John?
What is Harry's birthdate?
July 31st, 1980.
What was Lee Jordan showing people on the Hogwarts Express in Harry's first year?
A tarantula. "The twins were back. 'Listen, we're going down the middle of the train - Lee Jordan's got a giant tarantula down there.'" - PS, chapter 6, page 98
Name all positions on a Quidditch team (and how many of each).
What are Keeper, Chaser (x3), Beater (x2), and Seeker?
The spell in which Hermione uses to fully immobilize Neville in PS.
What is Petrificus Totalus?
The award Gilderoy Lockhart boasts winning 5 times in a row.
What is the Witch Weekly's Most Charming Smile Award?
Name at least 7 (there are 9) classes that Harry takes as of PoA.
Transfiguration, Charms, Potions, Herbology, Defense Against the Dark Arts, Astronomy, History of Magic, Care of Magical Creatures, and Divination.
What are the first spoken words of the series, and who says them?
"Little tyke", Vernon Dursley. "... Dudley was now having a tantrum and throwing his cereal at the walls. 'Little tyke,' chortled Mr. Dursley as he left the house." - PS, chapter 1, page 2
Name all the players on the Gryffindor Quidditch team as of Harry's 3rd year.
Who are Oliver Wood, Angelina Johnson, Alicia Spinnet, Katie Bell, Fred Weasley, George Weasley, and Harry Potter?
The function of the spell Impervius.
What is to make an object repel water?
Name 5 characters in Ravenclaw.
Who are Cho Chang, Terry Boot, Anthony Goldstein, Michael Corner, Luna Lovegood, Filius Flitwick, Myrtle Warren, Gilderoy Lockhart, Quirinius Quirrel, and Penelope Clearwater (among others)?
In which year of their schooling did Fred and George find the Marauders Map?
1st year
What type of broom does Cho Chang ride (according to Oliver Wood) in PoA?
A Comet 260. "'Cho Chang. She's in fourth year, and she's pretty good...' ... 'On the other hand, she rides a Comet Two Sixty, which is going to look like a joke next to the Firebolt'" - PoA, chapter 13, page 254
The Seeker for Ireland's Quidditch team at the Quidditch World Cup.
Who is Aidan Lynch?
The function of the spell Aparecium.
What is revealing invisible ink?
The flavor of Bertie Bott's Bean that Albus Dumbledore came across in his youth, causing him to lose taste for them.
What is vomit?
What is the name of Marge Dursley's favorite pet dog, who she brings with her to visit her brother in PoA?
Ripper. (bonus point! he's a bulldog and chased Harry up a tree once!)
Ron has owned Scabbers the rat, and Pigwidgeon the owl, but he is also in possession of another animal, which he does not bring to Hogwarts. What is this animal?
A frog. "... (A)nd the fish tank on the windowsill, which had previously contained frog spawn, now contained one extremely large frog." - GoF, chapter 5, page 56.