Has an Olympic Basketball (Men) game ever ended 104-81?
Exactly once. On July 21, 1980, Spain beat Poland 104-81, and no Olympic Basketball (Men) game before or since has ended that way. When it happened it was a scorigami, the first 104-81 in league history.
That makes 104-81 the 126th most common final score out of 698 that have ever occurred in Olympic Basketball (Men). One point away, 105-81 has happened never and 104-82 has happened 1 times.