SAT Math Exercise: Number Properties

Assuming whole numbers (integers), what is the correct answer for each of the following:

1. positive x positive = positive or negative?
2. negative x negative = positive or negative?

3. positive x negative = positive or negative?

4. even + odd = even or odd?

5. odd + odd = even or odd?

6. even + even = even or odd?

7. even x odd = even or odd?

8. odd x odd = even or odd?

9. even x even = even or odd?

10. positive odd x negative even = positive odd or negative even?

11. negative odd x negative odd = positive odd or negative even?

12. negative odd x positive even = positive odd or negative even?

13. Which is greater? -3 or -4?

See Comments for answers.