Had you looked just a couple of topics below the top of the page, you'd have found another one titled 'Mathematics' in which your question had already been answered. Had you done a search, you'd have found this thread (which your post is now merged into) which was last active only yesterday. Had you checked the Archive Reference Thread at the top of the page, you'd have found several links of use to you.
Some of the things we look for in new pilots are resourcefulness, initiative, observation and an eye for detail. These things would seem to be lacking in some of our newer members!
Scroggs