How is Google giving every page a rank out of 10?

@mike 

Google does not assign a specific "rank out of 10" to web pages. Instead, it uses a proprietary algorithm called PageRank to determine the relevance and importance of web pages and assigns a numerical rank, usually referred to as a "search engine ranking position (SERP)" based on hundreds of factors. The PageRank algorithm takes into account factors such as the relevance of the page's content to the search query, the quality and quantity of links pointing to the page, the relevance of those linking pages, and many other signals to determine the overall ranking of a page.