This page lets you practice your density, mass and volume calculations. The problems
are randomly generated when you press the "New Problem" button. Enter your answer in the empty
square and press "Check Answer". The results are displayed in the second table which also displays a running total of your score.
If you get a question wrong, redo it. Pressing "Show Answer" will cause the correct answer to appear and you will no longer be able to submit an answer for that problem.