Literal question
H06. _ _ Number of rooms used as living quarters
N.B. Rooms to be excluded from the counting are: hall/passage, bathroom, shower room, toilets, storage room, and any other room used for trade or business.
Interviewer instructions
Question H06: Number of rooms composing the dwelling unit
The question is clear enough. One will limit oneself to rooms really inhabited, or inhabitable, while ignoring those used for other purposes (kitchen, storage room, toilets, entry, and so forth).