At the bottom is a hint
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The Link to answer a question links to Unanswered QuestionsUnanswered Questions (ordered by votes). I would say these are hard questions (since no answer exists at the moment). A new user might be frightened off by these questions thinking he/she can't answer any of them.
Why not link to the Newest Questions instead?
Official response: status-completed Now links to newest unanswered questions