You may browse for a certain category (In the blue field on the left side of this screen), then scroll through unanswered or answered questions in that category.
If you are referring to why it is hard to find questions with the right answers on wiki.answers it is because anyone, and everyone, has the ability to answer questions on this site. Sometimes kids come on to this site and write bogus answers because they think they are funny. The people who do answer the questions here try really hard to answer them correctly and with detail, and try to correct the wrong answers.
There are many answers about Alexander on this site, and you can ask for answers of other questions as well. Similarly there are answers about the Hanging Gardens in the Mesopotamia site.
Just answer the questions, they aren't that hard >.>
These questions are hard, I have the same ones to answer. So difficult to find these answers.
Answers.com strives to provide correct answers to every question we handle. Some contributors and Supervisors enjoy researching "hard questions, while other questions that seem hard are easily answered by someone who has worked in that field. Visitors to Answers -- from all walks of life and varied occupations / interests -- find that it is truly addictive to come here, see questions they can answer, and receive positive feedback from the community.
Umm, this might be a little too hard...
dummy this dummy that hard questions no answers
I would say that if you would have a very hard time answering the questions. Do you know the answers to most of the questions before someone buzzes iin when you watch the show.
For many people, this site is very useful as they get the answers they want to their questions. Not everyone will get answers, as the site has a huge amount of questions, with new ones constantly coming in. As a result some people find the site useful and others are not happy with it. The volunteers here work hard to get as many answers for those that ask questions. More and more useful knowledge is being added to the site as a result.
Although there are a few nonsense answers, most are worth answering. For instance, "Do ladybugs eat other ladybugs?" is a reasonable question, one of many.
Olympia - 2012 Answers Are Hard to Find 1-4 was released on: USA: 29 April 2012
There apparently is no Impossibly Hard Quiz 4 (as of 2011).(See the related questions for the first three quizzes.)