I'll give you two or three capital cities and a distance, and you tell me which countries have land that lies within that distance of both or all of the cities. For instance, if I said 500 km, Havana, and Kingston, the answers would be Cuba and the United Kingdom.
Answer must correspond with the yellow box
Includes overseas territories, departments, etc. (in the example, the Cayman Islands)
I used https://www.mapdevelopers.com/draw-circle-tool.php, so the city center is as defined by them
Note that when you go there, you'll have to click the fullscreen button and zoom out. Also, the "circles" don't look like circles because they wrap around the poles.
https://www.mapdevelopers.com/draw-circle-tool.php?circles=%5B%5B8000000%2C-41.2887953%2C174.7772114%2C%22%23AAAAAA%22%2C%22%23000000%22%2C0.4%5D%2C%5B8000000%2C-22.5743922%2C17.0790688%2C%22%23AAAAAA%22%2C%22%23000000%22%2C0.4%5D%5D
Note that when you go there, you'll have to click the fullscreen button and zoom out. Also, the "circles" don't look like circles because they wrap around the poles.