Answer:
Only one; the last brick you put in will complete it.

Haha
cannabis campbell Reviewed by cannabis campbell on . St Ives - Brainteaser As I was going to St Ives I met a man with seven wives And every wife had seven sacks And every sack had seven cats And every cat had seven kits Kits, cats, sacks, wives How many were going to St Ives????? Rating: 5