Wikipedia: "St. Joseph's population peaked in 1900, with a census population of 102,979. This population figure is questionable, as civic leaders tried to inflate the numbers for that census."
West Memphis, Arkansas is west of the Mississippi River. Except for miniscule slivers of land left behind by the continually changing course of the river, Tennessee is east of the Mississippi. New Orleans is on the east bank as are downtown Minneapolis and St. Paul. The quiz seems to encompass all cities on the river.