In answering, you can take as much time, and use whatever tools you like to assess the sites, but please don't skew the results by performing the queries on Google yourself.
You can try your hand with just one keyword, or keep going - trying anywhere up to 10 keywords (each with a pair of pages to put in order). Note that you *don't* need to do all of them - you can submit after any number.
You can take the survey either for the US (
google.com) or UK (
google.co.uk) - and note that for each keyword, *both* of the pages listed rank in the top 10, so you know that both are considered reasonably trustworthy by Google - in other words this isn't intended to be a spam-detection test. All results are considering only the "blue links" results - i.e. links to web pages - no universal search results / one-boxes etc.
If you want to know how well you did, you'll have to note down your answers as you go along - then the confirmation screen gives you a list of the correct answers.