This week, there's three questions that are all a bit easier than last week's really. This time they're included in a PDF file, so enjoy

 

I'll post the answers in exactly a week's time, and probably a couple of hints too.

mathsprobs2.pdf

Edit: please note that I've changed the file as of now for the original problem set. I forgot to put a piece of information in the first question that made it rather tough otherwise

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Nobody's actually posted anything yet, so I'll give you all a bit more of a chance before posting the answers.

Well I've decided to post the answers because I don't want to leave people hanging in the loop but I'll put another question up tomorrow or the day after (or when I have time). Any suggestions should be mailed to me. Cheers

mathssol2.pdf