Of the following numbers, which is an integer but does not belong in either of the subsets of integers: −13, 0, or 13?

The number 0 is an integer, however it does not belong in either of the subsets of integers.

An integer is a whole number that can be positive, negative, or zero. All three numbers, −13, 0, and 13, are integers because they are whole numbers. Therefore, none of these numbers does not belong in any subset of integers.