There are no three didgit numbers but there are 63 three digit numbers.
8
6, as long as they are all different
24 if you don't repeat any numbers.24
25=20,21,23
30
There are only 999 three digit whole numbers.
A lot
Oh, what a happy little question! There are 90 three-digit palindromic numbers in total. You see, they start at 101 and end at 999, with each one bringing its own unique charm and symmetry to the canvas of mathematics. Just imagine the joy of exploring all these lovely palindromic numbers!
171
There are 900 three-digit numbers.
300300300300