All you have to do is slowly go through the numbers until they don't let you go any further. They will do this for every single row. This happens to every chest in the game.
it is in the chest in mick and fabians room
its in the living room in the chest to the left
fab amd micks chest in their room
Its in the Living room in the chest on the right hand side
In the downstairs bathroom. in the chest
fab amd micks chest in their room
it is in the chest in mick and fabians room
In The Boys Hallway Chest At The Foot Of The Stairs Chest In The Kitchen Chest
its in the living room in the chest to the left
The chest in Victor's office to the left
In Nina's room, look in the chest!
fab amd micks chest in their room
Its in the Living room in the chest on the right hand side
Its in the Living room in the chest on the right hand side
In the living room next to Mick, Victor's office (the right chest), and the laundry chest.. (:
In the downstairs bathroom. in the chest
It's in Patricia's room in the chest at the foot of her bed. Hope it helps !