There is only one and it is 2
If you include negative numbers, that's an infinite list.
Only one number can be both even and prime, and that is the number 2.
49 of them.
None. All counting numbers are even or odd.
An infinite number of even numbers are less than 10.
There are infinitely many: 29, 28, 27, ... 1, 0, -1, -2, -3, ...If you only want non-negative numbers, there are also infinitely many, since there are infinitely many fractions in an interval of any size. And if you include real numbers, you get an even larger (a so-called "uncountable") infinity.
There is only one and it is 2
One of them.
If you include negative numbers, that's an infinite list.
Only one number can be both even and prime, and that is the number 2.
49 of them.
None of them. All counting numbers are either odd or even.
None. All counting numbers are even or odd.
It varies by species, from 1 to a dozen or more, and even larger numbers from eggs.
All numbers are either odd or even, none are both, so less than 30 there are 29 counting numbers that are either odd or even but not both. (Assuming you mean starting to count with 1.)
All but the square numbers - 53 of them.