| I think this could be a good quiz, but here's a couple ideas that might make this quiz better:
1.) As mentioned, be consistent. Accept all airport codes, even the ones that are the first 3 letters of the city name, like FRA, SYD, MAD, DEN. I'm not sure how you can "accidently" get these correct/incorrect. If you're typing in these three letters, you're going for that city and its airport, since looking at the list, in all of these cases, each city only has one airport with scheduled service (including Madrid). But its frustrating not having a standard on what you can enter to get a correct answer (or trigger a mine).
2.)Accept Haneda for Tokyo International (nobody calls it that, really; its even called Haneda on its website).
3.)I tried every single way to trigger Houston - Bush Intercontinental, but couldn't get the mine to set off. |
U.S. States 
Countries of Africa 
Countries of Asia
