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World Largest Cities By Longitude Range – Choose Longitude
DirectionsBegin by choosing a longitude from -160 through 180 by entering it (only multiples of 20). Then, name the 50K+ world cities within 10 degrees east or west of that longitude trying to achieve the highest total population.
Quiz Takers 
I completely forgot about Australia
When you check the 50 missed list and realize you skipped an entire country!