Number Theory

2. A positive integer(>1) that has no positive divisors other than one and itself.
5. Any number that is either positive or zero.
7. ... ,-3, -2, -1, 0, 1, 2, 3, ...
8. Integers that follow in order without interruption.
10. A positive integer that has at least one positive divisor other than one or itself.
12. 1 divided by that number.
15. Any number that is either positive or zero.

1. Any rational or irrational number that can be represented on the number line.
3. A real number that has an infinite, non-repeating decimal expansion.
4. Any number less than zero.
6. Any number greater than zero.
9. Any real number that can be expressed as the fraction of two integers.
11. ... ,-3, -1, 1, 3, ...
13. A number that can be expressed in the form a + bi.
14. ... ,-4, -2, 0, 2,4, ...