In the Attic
in the attic
it will be in the attic of the house of anubis
it is in the woods
in victors office
Inside the house.
In the Main Hall
12, 24, 31, 41, 52.
Nope it is in the attic you'll see the word end
in the main hall but is in the dark part or entrance left bottom of the corner
you twist the pieces until they make the cup of ankh.
you find it by that thing shaped as an S
Okay, so the 6th puzzle piece is hidden in the left corner of the main hall... SIBUNA! (: