Some question in challenge section are ambiguously written, poor quality helping me to get -xp

Answer 1

That's the sad part about Sololearn as I assume the more people test challenges, and like them an algorithm automatically accepts them to be correct regardless of grammer, vocubalary or correctness in general; without Sololearn developers checking them for clarity.

Answer 2

yes developers must check ques/ans. before publishing it. User verification is not enough.
just allow users to post questions but question formatting , verification etc should be done by developers. else this app will become crap like other apps.