1. Cairo   Tagus Tagus Tejo   Nile Nile Blue Nile   Rhine Rhein   Spree   Hint Half-n-half Clue   2. Washington D.C.   Nile Nile Blue Nile   Aare   Thames   Potomac   Half-n-half Clue   3. London   Rhine Rhein   Yangtze Kiang Yangtse Kiang Yangtze Yangtse Chang Jiang   Thames   Tiber Tiber Tevere   Half-n-half Clue   4. Bern   Aare   Nile Nile Blue Nile   Ottawa, St. Lawrence Ottawa St. Lawrence Outaouais   Hudson   Half-n-half Clue   5. Berlin   Tiber Tiber Tevere   Ottawa, St. Lawrence Ottawa St. Lawrence Outaouais   Hudson   Spree   Half-n-half Clue   6. Belgrade   Zaire (Congo) Zaire Congo   Yangtze Kiang Yangtse Kiang Yangtze Yangtse Chang Jiang   Danube, Sava Danube Sava   Danube   Half-n-half Clue   7. Vienna   Tagus Tagus Tejo   Rhine Rhein   Zaire (Congo) Zaire Congo   Danube   Half-n-half Clue