It depends. You really have to read each one to know the answer. This is too vague of a question to answer.
its tells you all answers
because people have questions to ask and we have the answers
Some questions simply can not be answered. Some questions can only be answered by the person asking them. Some don't have a single, simple answer. The answer is different depending on point of view or the context in which it is asked or what it is referring to.
There is no limit to the number of questions that can be asked, or answers that can be given.
No; and this answer is proof of that. Thousands of answers are provided every day, though not all questions get answered.
Not all answers are inadequate. These questions are answered by the public, so some people could just say stupid answers but some are quite adequate
no anyone in the world that can speak English can answer here.
Your predecessors asked questions.
Some do get posted on Answers.com.
There are many people throughout the world who answer questions, but there are always more questions to be asked that need answers.
Because some of your questions may not have an answer or we don't know it yet
By going over to the left, in the blue edged box going down the page, scroll down until you see the section of the blue box where it states 'My Pages', under this section click 'My Contributions', from there filter the settings where it states 'Questions (asked)' and you will see all the questions you have asked on WikiAnswers.