The US and Canada of course have different tests and both are available at most public libraries, with answers.Practice tests are at the related links below. The actual tests are given verbally.
On the US Citizenship test there is not a set number of questions. But the questions on the test make sure one can read, spell, write, and speak the United State's language.
The test has 3 sections: 12 out 15 in the first section, 2 out of2 in the second section, and 2 out of 3 of the last section must be correct. However, these are for the tests taken up until March...