Which one of the following is a whole number but not a natural number?

Question

1) 0
2) 22
3) -12
4) 3

Answer 1

3) -12 is a whole number but not a natural number.

Answer 2

Which set of numbers is the largest family group that includes all of the others?

1) irrational numbers
2) natural numbers
3) rational numbers
4) real numbers

Answer 3

4) real numbers is the largest family group that includes all of the others.