I can understand a negative response on questions that obviously are exercises and no more. MSE isn't for cheaters. But else, if you have a question of your own, if you perhaps is a bit lazy, if you not are that good at working out proofs and don't want to invest time in improving this ability for the moment, is it okay to just post the question?
I studied math a long time ago and I remember a lot of it, but have also forgotten a lot of it. Now I'm working on a system for computational mathematics, BigZ ('big' for big integers and 'Z' for sets) and now and then, when evaluating and experimenting, find "conjectures" of all kind. I expect the degree of difficulty to prove those right or wrong to be exponentially distributed and I have no great intuition about which are which, so I frequently ask MSE and mostly get a positive reaction.
However some people seems to react negative if the solution appear to be very easy or if I don't provide efforts of my own. Of course it's a bad habit using a calculator for 35+15 or something but working out proofs for arbitrary problems is really never trivial - even if a proof (preferable) afterward is trivial to follow.
I include an example: A condition for being a prime: $\;\forall m,n\in\mathbb Z^+\!:\,p=m+n\implies \gcd(m,n)=1$. The nice formula $$p\in\mathbb P\iff\forall m,n\in\mathbb Z^+:p=m+n\implies\gcd(m,n)=1$$ turned out to have a trivial proof, which wasn't transparent for me.