1. 1920 Summer Olympics   Barcelona   Berlin   Antwerp   St. Louis   Hint Half-n-half Clue   2. 1980 Summer Olympics   Beijing   Athens   Montreal   Moscow   Half-n-half Clue   3. 1928 Summer Olympics   London   Amsterdam   Tokyo   Sydney   Half-n-half Clue   4. 1932 Summer Olympics   Amsterdam   Mexico City   Los Angeles   Paris   Half-n-half Clue   5. 2012 Summer Olympics   Seoul   Athens   Helsinki   London   Half-n-half Clue   6. 1988 Summer Olympics   London   Helsinki   Mexico City   Seoul   Half-n-half Clue   7. 1948 Summer Olympics   London   Stockholm   Atlanta   Tokyo   Half-n-half Clue