Municipalities of Coastal–Karst with a Map

Can you name the countries of the world where at least 50% of residents are Islamic?

Can you name all the countries where a majority of the population speaks a Slavic language?

Name the 85 federal subjects or Russia which include oblasts, republics, krais, federal cities, etc...

Have too much time on your hands? Try to name as many of Europe's 904 first-level administrative divisions as you can.