Question

IS zero A REAL NUMBER?

Answer 1

Yes.

Answer 2

Zero is rational number since 0/1 = 0
It's also a whole number since whole numbers = {0,1,2,3,...}
It's also an integer, since integers = {...,-3,-2,-1,0,1,2,3,...} <==== 0 is in this set.
Zero is a real number. A real number is any number you can think of except imaginary numbers. Imaginary numbers are numbers such as √(-1).