Question

zero cant be classified as wich type of number?

Answer 1

complex
irrational
negative
not sure what you choices are

Answer 2

actually it is a complex number, skip that one

Answer 3

negative

Answer 4

Ex:
set of positive integers = {1,2,...}
set of non-negative integers = [0,1,2..}

Answer 5

Zero is also not irrational