Name all the 1M+ Cities (City Proper population)...when you enter a correct city all 1M+ cities within 500km of it will display. SEE NOTES BELOW.
NOTES - There are 56 1M+ Cities not within 500km of another city, these are also included and marked with a (*)...to get down to 300 answers I grouped the smallest 33 of these in 6 groups of 5 cities and 1 group of 3 for the answers, the remaining 23 largest you'll have to guess individually. Distances calculated via an Excel formula for distances between coordinates, where lat/long were obtained via World Gazetteer and Wikipedia. City populations are same ones used on my 7,500 largest world cities quiz.