it is in the main hall at the bottom left near a door
First Be Nina Then Go Up To The Attic And Find The Door And You Got Your Puzzle Piece And If You Find The Second Puzzle Piece Please Inform Me.
in the attic on the ground
you solve it by answering it
it will be in the attic of the house of anubis
it is in the woods
In House of Anubis, the sixth puzzle piece is in the wall, in the main hall. If you get outside of the main hall you have gone too far. There is a secret spot on the wall to push.
in victors office
Inside the house.
you find it by that thing shaped as an S
it is in the treasure chest.
In the Main Hall
Nope it is in the attic you'll see the word end