Citizenship tests

We talked about citizenship tests, in particular, questions about Don Bradman and Walter Lindrum.
A story on the sports hero questions is here, on Bloomberg.
The Australian Department of Immigration and Citizenship has an overview of the citizenship test, and advises to prepare for the test by reading the book entitled Becoming an Australian Citizen.
If you follow the links, you can take apractice test here. You get five questions only, with a choice of three answers each; it only takes a minute to do. I got 5/5, by the way...

The United States also has a citizenship test, and I found multiple sites with sample questions.
About.com lists 100 sample questions and provides the answers on the same page. Many of these seem rather repetitive. I started doing them and was getting them 95% correct, when I started running into those I couldn't answer, like Supreme Court Justices.
Here is another one, which seems to contain the same questions.
These appear to come from the US government's official Citizens and Immigration Services site, here, where they are proposed to be mounted as flash cards for the putative immigrant to use as a study aid.