To which of the following sets does the number 0 belong?

a) integers

b) rational

c) whole

d) irrational

e) natural

The number 0 belongs to these sets: A. integers, B. rational, and C. whole.

It is rational because it is the ratio of two integers (namely zero and one).

It is an integer because it fits the definition of integer. Integers are numbers in the set { ...,-3, - 2, - 1, 0, 1, 2, 3, ... }

It is whole because it fits the definition of whole. Whole numbers are the set {0, 1, 2, 3, ... }

It is not irrational because it's rational.

It is not natural because the lowest natural number is 1.