Practice

Homework

Eight problems, graded from routine to demanding, covering every subtopic taught on this site. Each solution is revealed one step at a time, so you can stop at the line that unsticks you and leave the rest of it hidden. Work in a notebook first. The steps are much more useful as a check on your own work than as a script to copy.

How to use these

Attempt the problem in full before revealing anything.
Reveal one step. If that is enough, close it and carry on alone.
Compare your final answer with the one on the card. A different-looking but equivalent answer is often still correct.

The homework, the assessments and the unit test are all generated from one question file, so that the web pages and the printable version can never drift apart. That means they need JavaScript to appear. The five lessons work without it, and the submitted PDF contains every problem and every solution in full.

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