“Rank size rule” : Singapore was the only largest city in Singapore therefore I can't use the rule. Populations of the other four largest cities : There is no other one.
The Rank Size Rule would not apply to Singapore since Singapore is the only largest city in Singapore. If there is no other large city in Singapore, then this would not be valid since the rule requires Singapore's five largest cities.
Population : 5,293,700 Population Density (per sq. km.) : 7,565 % Urban Population : 100% % Urban Population Living in Slums : 0% Average % Change in Urban Population : 1.2% % with Improved Urban Sanitation : 100% % with Improved Urban Water Supply : 100% Education: Pupil-Teacher Ratio (elementary) : 26.44