Look at the algorithm description guide. The examples start off easy, so you can do them before you read the answers. If they bore you, you can do the extension algorithms at the very bottom (pp86-87). You can find it at http://boredofstudies.org/courses/techsci/sdd/SOFTSPEC.PDF
Of course, you may have already seen these, and are asking for questions from fellow forum members. If so, then wait a little while. There might be people who have some good ones but are doing an exam at the moment.
Hmmm, that's funny, it did originally. Go to Lazarus' topic. Click on the link on the word HERE, and you should get to the Method of Algorithm Description PDF file.