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
it will be in the attic of the house of anubis
it is in the woods
you solve it by answering it
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
you find it by that thing shaped as an S
Inside the house.
In the Main Hall
it is in the treasure chest.
Nope it is in the attic you'll see the word end