450
I believe there are 2 positive three-digit perfect cube numbers, that are even.
There are 898 three-digit even numbers. Nine of them are multiples of 55. That leaves 889 * * * * * There are 450 three-digit even numbers and 17 of them are multiples of 55. So that leaves 433.
There are 450 even three-digit integers, from 100 to 998. This excludes numbers with leading zeroes (000 to 099).
With a total of 90,000 five digit numbers, we can conclude that there is 45,000 EVEN five digit numbers.
21
There are 900 three-digit numbers, ranging from 100 to 999.
A lot
None, because you do not have three even digits. None, because you do not have three even digits. None, because you do not have three even digits. None, because you do not have three even digits.
There are only 999 three digit whole numbers.
There are 90 palindromic numbers.
100