Question: what is the least density (per km²) when the area (km²) is more than 129825 and the rank is 3?
SQL: SELECT MIN("Density (per km²)") FROM "2-1860425-1" WHERE "Area (km²)" > 129825.0 AND "Rank" = '3';

Question: what is the  Density (per km²) when the Area (km²) is 372889 and the population (2011) is 1145861?
SQL: SELECT SUM("Density (per km²)") FROM "2-1860425-1" WHERE "Area (km²)" = 372889.0 AND "Population (2011)" > 1145861.0;

Question: what is the area (km²) when the rank is south africa and the population (2011) is more than 51770561?
SQL: SELECT AVG("Area (km²)") FROM "2-1860425-1" WHERE "Rank" = 'south africa' AND "Population (2011)" > 51770561.0;

Question: what is the least density (per km²) when the rank is 5 and the Area (km²) is less than 125755?
SQL: SELECT MIN("Density (per km²)") FROM "2-1860425-1" WHERE "Rank" = '5' AND "Area (km²)" < 125755.0;