Use the following applet to explore the basics in modular (or "clock") arithmetic.

Consider:[br][br]On a clock, there are 12 hours...what do we call hour 13?[br][br]Similarly, there are 60 minutes, and 60 seconds on a clock...but what do we call minute/second 61?[br][br]Suppose instead of having 12 hours on a clock, we had only 7. What would we call hour 11?[br][br][br][br]Can you write an equation showing the relationship between a, b and n?