"Který z vás je hloupější?"

Translation: Which one of you is more stupid?

[BoneheadBass]

I was wrong with "Which of you is more stupid," because DL wanted "Which ONE of you..." In other similar sentences, the "one" part hasn't been needed, so I don't understand why it's needed in this sentence. In case it really isn't needed (hope!), I've reported it.

[VladaFu]

Added, you can check if I did it correctly.

[BoneheadBass]

Thanks -- looks good! :-)

[Clive_Alive]

Does not work when selecting words. An answer without "one" ix rejected

[BoneheadBass]

Please see my reply to one of your other comments regarding the word bank.

[JamesDrotl]

"Which of you is more foolish" is the same thing.

[BoneheadBass]

That is now an accepted translation.

[BrianG1941]

Why is 'one' needed here, in english it is redundant

[BoneheadBass]

Translations without "one" (and with an appropriate adjective) are now accepted.

[Clive_Alive]

When selecting words, i do not have the option of "more stupid” or "stupider" etc, just plain "stupid", which is accepted but I think is incorrect

[Clive_Alive]

I.e. i can write "which one of you is stupid" but not "more stupid"

[BoneheadBass]

The word bank should contain all the tiles needed to form the "main" translation shown above, plus some "decoy" words. So it sounds like there may be something strange happening on the system side. If that's the case, it is not something that the course team can fix. You may need to file a bug report directly with Duoling; info is available here: https://support.duolingo.com/hc/en-us/articles/204728264-How-do-I-report-a-bug-.