Using a greyscale filter, all of the colours in these country flags have been washed out, leaving just a black and white image. Which countries are these?
The quiz will accept the standard Jetpunk type-ins for the relevant country names (e.g. KSA would work for Saudi Arabia if that was an answer). RSA is not a standard type-in and so is not recognised. Personally, I think it maybe should be, but that is not for me to decide :)
Nice quiz! It captures an idea that has been on my mind for some time! I think it is a little too easy for all those flag buffs out there. I finished it in 90 seconds.
Here is a quiz I put together recently that is more challenging (sorry, I don't know how to embed a link in the comments):
Here is a quiz I put together recently that is more challenging (sorry, I don't know how to embed a link in the comments):
https://www.jetpunk.com/user-quizzes/106934/country-flag-negatives
I like the Black and White Swiss flag a lot