Has a FIBA World Cup game ever ended 83-82?
Exactly once. On September 11, 2010, Turkey beat Serbia 83-82, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 83-82 in league history.
That makes 83-82 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 84-82 has happened 3 times and 83-83 has happened never.