By the way, I'm very tired, so this might just be my misreading, but I found the UN question to be ambiguous - "Do you think the percentage of African countries in the UN is above or below [65%]?" I read that as, "Of all the countries in Africa, what percentage of them are in the UN?", not as what I believe to be the intended "Of all the countries that are in the UN, how many of them are African?" The answer to the former can quite obviously be guessed as "100% or darn close", but the answer to the latter is less obvious.
By the way, I'm very tired, so this might just be my misreading, but I found the UN question to be ambiguous - "Do you think the percentage of African countries in the UN is above or below [65%]?" I read that as, "Of all the countries in Africa, what percentage of them are in the UN?", not as what I believe to be the intended "Of all the countries that are in the UN, how many of them are African?" The answer to the former can quite obviously be guessed as "100% or darn close", but the answer to the latter is less obvious.