Start with the interest, not the building. A house can be owned in fee simple, occupied under a life estate, or rented for a fixed term. A shared pool does not tell you whether a community is a condominium, a cooperative, or an HOA.
Next, follow the interest through the event in the question. After a death, identify the measuring life, any remainder or reversion, and whether survivorship was created. For co-owners, equal shares do not prove survivorship, and an undivided interest is not a physically separate piece of the land.
For homestead, decide whether the question concerns creditors, a will, or property taxes. For cancellation, identify the governing statute, the seller’s status, the missing documents, and whether closing has occurred. Memorizing a number without its trigger is where mistakes start.