Lesson 3

Homework

1. Check in on progress on homework 2.

Intro Quiz

Quiz 2, on finding the consequences of basic argument structures, and on finding a counterexample to a false claim.

Today's Topics

1. Review the "magic trick", discuss possible ways to solve it, and test anyone who thinks they know how to do it.
2. When do you use the factorial ($n!$) or the exponent ($n^n $) ??
3. How many different license plates are possible in Rhode Island and in California?
4. The hand-shake problem: Four nervous people are at a meeting where they don't know anyone. To introduce themselves, they each have to shake every other person's hand. How many hand-shakes will occur? How about if there are 5 people? 6? What is the pattern?

New Homework

1. See Homework2, which has been extended to March 21 for T/R classes and March 25 for M/W classes.