149 of them.
102 = 100 which is the first possible three digit number that is a perfect square. 312 = 961 which is the last possible three digit number that is a perfect square. So there are 22 three digit positive numbers that are perfect squares.
An infinite number if you can use positive and negative numbers.
90
There are a total of 5 positive three-digit perfect cubes that are even. To find this, we first determine the range of three-digit perfect cubes, which is from 46 to 96. Then, we identify the even perfect cubes within this range, which are 64, 216, 512, 729, and 1000.
90
A lot
There are only 999 three digit whole numbers.
4,000 even numbers, 4,000 odd numbers.
There are no three didgit numbers but there are 63 three digit numbers.
There are 294 such numbers.
171