"Do you need him?"
Translation:Braucht ihr ihn?
The english does not specify number, so my rendering it as singular is also correct.
That is correct.
This is one of the sentences that is not supposed to be part of the public Duolingo course, but has spilled over from another effort, probably the cooperation with Pearson ( see https://www.duolingo.com/comment/24066422 ).
It should ideally be corrected to accept both Brauchst du ihn? and Brauchen Sie ihn?, which are also correct.
I wrote "Brauchst du ihn" and tried to report that "my answer should be accepted" but that was not available as a choice. Can you as a moderator report it through other channels? Also, the up/down voting arrows have not been working since the "updates" DL made. I mentioned it on the forum that announced the updates, over a month ago. Do you know whats going on with that and why it takes so long to make corrections?
Brauchst du ihn should be accepted now as far as I can tell; the exercise has been edited since my previous comment and now includes Brauchst du ihn and Brauchen Sie ihn as well.
If you come across this exercise again and Brauchst du ihn is rejected, can you make a screenshot, upload it somewhere, and link to here, please?
Also, where did you encounter the exercise? On the website or a mobile app -- if a mobile app, which one (e.g. Android, iOS, Kindle Fire, Windows Phone, ...) and do you have the current version of that app?
I encounter this problem mobile app, du and Sie is not available to chiose.
how could I know if "you" is plural or singular. Both answers would be correct
Both Braucht ihr ihn? and Brauchst du ihn? are correct translations of "Do you need him?", so "should actually be" is wrong.