This never means "Where are you from?" It simply means "Where are you (plural)?"

I believe "where are you from" would be more correctly translated "你是哪国人." Directly meaning "You are what nationality."

The character for "from" looks like ren twice, and it sounds something like "cong". It's funny for me to see that someone else has been using Google to practice writing characters until Duolingo adds that functionality here.

Google translate is notoriously bad at doing sentences.

it is something that pops up in the Beijing dialect/speech pattern. We tend to add 儿 to the ending of a lot of words and phrases, and it makes it sound more casual. 哪里 is just as correct.

It cannot be isolated here. 哪儿=哪里=Where.

It doesn't mean anything here,just a sound used at the ends of many words.

yes yes...What's the fuction of 儿 ._.

Yeah, the first time i did this lesson duo taught me that "you guys" is correct. Now it says that's wrong and it should be "you all". Neither is the correct plural for "you" in English. I get it that they are trying to emphasize the plural aspect, but then it should still accept what it originally taught was correct. While l thought "you guys" was funny and incorrect, still better than "you all", which is southern US slang in this context. Taken literally, "you all" has an entirely different meaning.

Yes, here too, marked wrong but also shown as the correct answer. Question mark usually never made a difference, but here it does?

Yeah got that as well

I hardly ever write the "?", then I did not put it here either and it was wrong.

I agree

Yep

妳，妳們 exist but they are much less used, especially in Mainland. Even if all people in "You" are female we can use 你們. It is not gendered in particular.