"How many cats does he have?"
Translation:Πόσες γάτες έχει;
isn't Πόσες feminine plural?
That's right -- it agrees with γάτες, which is feminine plural.
I am not where in the sentence we use the term for 'him'.
You could say Πόσες γάτες έχει αυτός; with αυτός for "he" -- but since the verb ending indicates the subject, it's often left out in Greek.
Admittedly, έχει could mean not only "he has" but also "she has" or even "it has", but in context, it's usually clear whom you're referring to.
Just commenting here in case a moderator sees it and might be able to help. I didn't know what to select on the "report" button. I was wrong, and when the correct answer was shown, the box where I had typed was empty. I wanted to compare my answer to the correct answer, but I couldn't see what I had typed anymore. This doesn't happen always. I just wondered if it could be fixed. Thank you!
Your answer disappeared?! I've never seen that!
This doesn't happen always.
But has happened more than this one time? Then it'd be worth taking a screenshot and either posting it in the troubleshooting forum or filing a bug report, if I understand correctly what happened.
In terms of reporting the exercise, my suggestion would be to either report that your answer should be accepted if you had no reason to believe it was wrong, even without the comparison, or select 'something else went wrong' because it'll still prompt the course contributors to check for errors in this exercise in the incubator.
Update: this is a bug that Duolingo is aware of and is fixing as we speak. :) Edit: It should be fixed now.
If you see it again, please file a bug report: https://support.duolingo.com/hc/en-us/articles/204728264-How-do-I-report-a-bug- .