Situation: I am facing a backpack on top of a table, while standing in the middle of the room between two groups of tables.
Alternative situations: Got up from a chait in my seven o'clock direction, I was about to take a spray from my backpack and clean the table behind me. I am looking a the table on my top right corner as I write on a piece of paper on the table in front of me.
Question: Is the number of chairs at the table directly behind me odd or even?