Has a FIBA World Cup game ever ended 98-64?
Exactly once. On August 23, 2006, Argentina beat Nigeria 98-64, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 98-64 in league history.
That makes 98-64 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 99-64 has happened 1 times and 98-65 has happened 1 times.