well first off, use a calculator, or just use a sheet of paper, i dont know, and alberts ghost. oh here we go. so you need to find the first arm, the second arm, and the head. put them on a stone slab thing in like the weird rust dimension with all the doors. the head is in a corner with only a locker and a staff only type door. in the locker contains the head. put trash in front of the door to make mr cleany sweep and open it. then you need a knife. open the right door with the knife in hand, (not the door that mr cleany opened). you will be brought to a room with doors on the side and one at the end of the hallway, again with the knife open it and thats the room where you place the body parts down. the first arm is in a room in the keep locked hallway. i think you need the.. blue key if im correct. and im trying to remember the second arm... pretty sure you need to go to that one hallway that leads you to the start, but use a knife to open it. you go in a red room with two lockers. one of them contains the second arm. put all the body parts as i said onto the stone slab and it will literally crush alberts body and make his ghost appear which then tells you the answer to the problems if my first two methods take too long.