Has a FIBA World Cup game ever ended 101-40?
Exactly once. On November 25, 2017, Tunisia beat Chad 101-40, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 101-40 in league history.
That makes 101-40 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 102-40 has happened never and 101-41 has happened never.