Has an Olympic Basketball (Men) game ever ended 120-117?
Exactly once. On July 21, 1976, Australia beat Mexico 120-117, and no Olympic Basketball (Men) game before or since has ended that way. When it happened it was a scorigami, the first 120-117 in league history.
That makes 120-117 the 126th most common final score out of 698 that have ever occurred in Olympic Basketball (Men). One point away, 121-117 has happened never and 120-118 has happened never.