Where does Harry live in the Dursley’s home? In a closet under the stairs

Who is Fluffy? Hagrid's three-headed dog

Who named Rowling the first first person to become a billionaire by writing books? The Forbes Magazine

To whom does the Philosopher's Stone belong? Nicolas Flamel

Where did Rowling write her first Harry Potter book? In the Elephant House

Who decides where the children will be housed at Hogwarts? The Sorting hat