The following is a quiz to test your ability to differentiate functions.
You click on the circle next to the answer which you believe that is correct.
After you have chosen the answer, click on the button *Check
Answers*. You will then be told whether the answer is correct or not. Explanations are
given when you click on the correct answer. There are a total of **60** problems; you will be given a
score at the end of the 60^{th} problem.

This page was originally written by Marek Szapiel.