I hope that helps. 1. From your narrative the exclusions in sections 32 and /or 33 of the Copyright Deigns and Patents Act 1988 may apply. Read these sections carefully and revert to me. You may have a problem with section 32 of you are charging commercial fees. 2. A question such as thatvwould not be termed a literary work and so would not be subject to copyright. 3. There is nothing to prevent you putting this statement on your website. I hope that help. Please leave a positive rating so that I am credited for my time.
1. If you are using copyright material you are in breach of copyright unless you fall into the education or exam provisions of the sections Inhave cited and if you are running a business you should be aware of these. In the absence of your commenting on these sections, my answer is that you are likely to be in breach of the Act. The fact that is on the internet is irrelevant. The internet isn't exempt from the law of copyright. 2. I don't agree that these questions are subject to copyright unless you use them altogether as part of a paper that the organisation hasn't written.
Are you doing this commercially for money?
There probably aren't any as they are unlikely to sue for using small exerpts where credit is given. As regards ***** ***** am saying that if you use the whole series of questions as one work you could encounter difficulties. However one question in isolation is unlikely to breach copyright a question is a question and you are right you could reword. However, how hard is it just to make these up yourself anyway?
Amend the question as necessary and provide the model answer which I presume will be your work in any event.
Subject matter cannot be copyright.