**Problems 1-8**

See Example 1.

**Problems 9-14**

See Example 2. Start with the given statement and use the postulates, one at a time, until the result is the “to prove” statement.

**Problems 15-20**

This is a variation of the letter game of Example 2. Start with the given statement and use the postulates of this problem, one at a time,until the result is the “to prove” statement.

**Problems 21-24**

You can set up one truth table to answer all of these questions. Let *p *: I am a knave and *q *: He is a knight. Write a truth table showing all four possibilities for *p* and *q*.

**Problems 25-30**

These are one-of-a-kind problems, somewhat akin to Example 7. You need to think about each of these, and when you think of the answer you will have a “gee-whiz” moment.

**Note:** Homework Hints are given only for the Level 1 and Level 2 problems.

However, as you go through the book be sure you look at all the examples in the text. If you need hints for the Level 3 problems, check some sources for help on the internet (see the LINKS for that particular section. As a last resort, you can call the author at (707) 829-0606.

On the other hand, the problems designated “Problem Solving” generally require techniques that do not have textbook examples.

There are many sources for homework help on the internet.

**Algebra.help**

Here is a site where technology meets mathematics. You can search a particular topic or choose lessons, calculators, worksheets for extra practice or other resources.

http://www.algebrahelp.com/

**Quick Math**

This site provides online graphing calculators. This is especially useful if you do not have your own calculator.

http://www.quickmath.com/

**The Math Forum @ Drexel**

This site provides an internet mathematics library that can help if you need extra help. For additional homework help at this site, click one of the links in the right-hand column.

http://mathforum.org/