Especially when one of them is Poland, which is incredibly easy to confuse with a couple of other flags. In order from the lowest percentage to the highest:

• 1st row: Japan, North Korea, Bangladesh, Tunisia, Egypt

• 2nd row: Jordan, Armenia, Comoros, Poland, South Korea

I mean, it's got a map, too...

I can ID Japan, South Korea, North Korea, Egypt, Tunisia, and Poland on there without even going to check if I'm right. (I also correctly guessed Bangladesh and Jordan but had to check to be sure, and incorrectly guessed Georgia instead of Armenia.)

Can't tell what the 10^th^ country is, though, as I don't see any others marked in red.

I think its a good skill to know the world map. Not naming the countries is a good way of knowing wich you are missing

If it was just the flags maybe, the fact that it comes accompanied by a map with highlighted countries means the onus should be on them to, you know, learn something.