>>1476935I'm not 0
I'm not 1
I'm not 2
I'm not 3
I'm not 4
I'm not 5
I'm not 6
If we allow Z to be the set of all integers greater than 0, including zero, excluding 20. Then my age is not a member of that set.
And equally, if we allow Q to be the set of all Real and Complex numbers excluding the number 20, my age would not be any member of Q.
I have answered your question.