Has a FIBA World Cup game ever ended 105-89?
Exactly once. On September 6, 2002, Spain beat Brazil 105-89, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 105-89 in league history.
That makes 105-89 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 106-89 has happened never and 105-90 has happened never.