Has a FIBA World Cup game ever ended 98-73?
Exactly once. On July 2, 2018, Georgia beat Austria 98-73, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 98-73 in league history.
That makes 98-73 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 99-73 has happened never and 98-74 has happened never.