Has a FIBA World Cup game ever ended 40-33?
Exactly once. On October 23, 1950, Brazil beat Peru 40-33, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 40-33 in league history.
That makes 40-33 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 41-33 has happened never and 40-34 has happened never.