You can. There has been no changes to stop answers.
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it can give you the right questions.
It can. Many people on WikiAnswers answer math questions.
because they are very busy updating other things
They do; it just takes longer than expected.
WikiAnswers has answered that question. Please see the related questions area. Sometimes it takes a while for someone who knows the answer to find certain questions, since there are so many.
Because the owners of WikiAnswers decided to make the rules that way.
Because there are so many people people trying to impute questions at once.Because there are millions of questions already and the website cant hold anymore.
you cant
Since there is no vital citation on this i cant tell you how many are edited hourly.
you cant
it cant talk
If you mean a question that is trashed it is to protect users from questions that might be considerecd inapproriate, and since there is no reason for it to be answered there is no reason to see it.