1. Give an example from real life where it is the absolute value (magnitude) of a quantity that matters, and not whether the quantity is positive or negative.
2. There are an infinite number of natural numbers {1, 2, 3, 4,...}, and also an infinite number of EVEN natural numbers {2, 4, 6, 8,...}. Why does it make sense to say that there are just as many even numbers as natural numbers? Give an argument in support of this statement.
3. Do computers work with rational numbers or real numbers? Why do you think so?
4. Is -10 greater than -5, or is it less than -5? Why or why not?
