This question already has an answer here:
For some reason, it seems that more recently the users of this site have adopted the fashion of commenting things like "What have you tried?", "Show your work", etc. In almost every question for which the OP has not shown his work.
I completely disagree with this stance, here's why:
The comment gets upvoted.
The op might or might not show his/her work (which is not something required to as a question here).
If OP doesn't show work, the question most often gets a few downvotes/close votes.
So, in many cases, if someone finds an interesting problem (here's another discussion: homework vs no homework, but I don't feel like going into that here) that he/she doesn't have the knowledge/abilities to solve it, it gets closed and forgotten.
What do you guys think?