Has an Olympic Basketball (Men) game ever ended 70-50?
Exactly once. On November 26, 1956, Japan beat Thailand 70-50, and no Olympic Basketball (Men) game before or since has ended that way. When it happened it was a scorigami, the first 70-50 in league history.
That makes 70-50 the 126th most common final score out of 698 that have ever occurred in Olympic Basketball (Men). One point away, 71-50 has happened never and 70-51 has happened never.