I see the web www.levels-tv.net have pagerank 3,but it only have 6 backlink, someone can explain to me,why it's pagerank can get 3?
Pagerank completely depends on inbound & outbound links of the web pages. The site mentioned by you has nearly 50 backlinks as reported in Yahoo. So the site from where its linked is having 4 page rank which had helped the site to gain page rank 3. If you want good PR for your website try to get more backlinks from high PR relevant website.
Either they're 6 very high PR links, or you're using the wrong method to look at their links. Google doesn't show all links in a link search.
Yes,some of the site get very few backlinks,but they do quality links,and if the site is not very young,it may get great pr also.I saw some site get pr 5 with less than 10 backlinks.
I've notice that the site has only 3 backlinks. We know that google doesn't display all the backlinks of the site so I guess the site has strong backlinks from related site but we can't see it because all backlinks can only be seen on google webmaster tools.
links from High PR pages are much better than links from no or low PR pages. The site you mentioned, see if the in coming links are from high PR pages
this 8 month site not only got 50 backlinks but more importantly has almost 400 internal link. it also has some pr 3, 2 and 1 backlink. so there is nothing weird about it.
link of the site will help to see more about it... maybe because the backlinks that it has are very good ones... LOL
The tool bar PR in your browser is a rouse. The real PR google uses is never revealed. Just like they won't show all the back links to a page.