Harry Potter Deathly Hallows Christmas Question?

I am playing an online deathly hallows trivia game and I am really stuck on this question;

'How many Christmas trees are in the Great Hall of Hogwarts during Christmas, and where in the DH book do you find it? '

Obviously I know there are 12 trees in the great hall, but I can not remember this being mentioned in Deathly Hallows. I have checked in the book before they left the burrow, around christmas time etc. But I can't find it. Please help!Harry Potter Deathly Hallows Christmas Question?
It's mentioned on page 265, right at the bottom, at the point where they're at Godric's Hollow.

Harry is reminiscing about Christmas at Hogwarts.

Quote is:

"It made Harry's throat constrict, it reminded him so forcefully of Hogwarts, of Peeves bellowing rude versions of carols from inside suits of armour, of the Great Hall's twelve Christmas trees, of Dumbledore wearing a bonnet he had won in a cracker, of Ron in a hand-knitted sweater..."



Hope that helps!Harry Potter Deathly Hallows Christmas Question?
It is 12 oh and let me guess you are at www.scholastic.com/harrypotter that trivia game part. I have been there before too.Harry Potter Deathly Hallows Christmas Question?
Harry only goes to Hogwarts at the end of the book, not sure if that this is at Christmastime so I don't think there is any mention of how many.........Now have an excuse to re-read the book