Ron throws the Quaffle accidentally at Katie Bell during quidditch practice in Book 5. Ron throws a sprouts knife at Fred who turns it into a paper plane in book 6. Ron is part of a snowball fight in Book 4. It is Ron who gets the badge thrown at him in Book 4 by Harry. 

Which of the following items has Ron never thrown at someone before?

Summersby was the Hufflepuff seeker in book 5. They were the only Seeker among the rest and thus would have not scored a goal.

Which of the following Quidditch players has never scored a (recorded) goal before?

Which of the following books did Hermione reject from their travel pile in Book 7

Slughorn uses it to clear Marcus Belbys windpipe when he chokes on pheasant

What spell does Slughorn use to save a student in Book 6?

Salamander blood was used in the Strengthening Solution. Asphodel in The draught of living death. Peppermint in Essence to Induce Euphoria. Human flesh in Voldemort's return potion. Only Boomslang skin was mentioned to be an ingredient. Doxy eggs were passed off as fake powdered dragon claw by Harold Dingle and eaten by the idiot Maclaggen but never mentioned as a potion ingredient in the books.

Which of the following were NOT mentioned as potions ingredients in the main book series?

Harry only speaks to the dead body of Bathilda inhabited by Nagini

Which of the following characters never spoke to Harry?

Four. The Basilisk, the snake in his duel with Malloy, the Boa in book1, Nagini in book 7

How many different snakes in total does Harry speak to or hear speaking throughout the series?

It is Percy who turns Pius Thicknesse into a sea urchin 

Which of the following did the twins never do to Percy?

Fleurs wand used Veela hair. The Elder wand used Thestral hair. Sir Cadogans wand used a troll whisker 

Which of the following was not used as a wand core?

Borage wrote Advanced Potions Making, a Sixth Year book. Cassandra wrote Unfogging the Future, a Third Year Divination book. Wilbert Slinkhard wrote Defensive Magical Theory, a useless Fifth year book. Kennilworthy Whisp wrote Quidditch through the Ages, which was never a book list book (but heavily borrowed by students).

Which of the following authors were not mentioned in the Hogwarts book lists? 

This was tested in the year the Marauders took their OWLs, not Harry’s

Formation of the International Confederation of Wizards

Which of the following were not examined during Harry’s OWLs?

Which of the following were not banned by Filch?

Only Potterheads need apply. If you get 12/12 you are a true whiz!