30,25,15,20, or 10.
5
There are no three didgit numbers but there are 63 three digit numbers.
There are 900 three-digit numbers.
300300300300
45
21
5
21.
There are no three-digit numbers that equal 17. In fact, there are no numbers with more or less than two digits that equal 17. In fact, in the whole infinite supply of numbers, there is only one single number that equals 17. That number is . . . . . . . 17 .
There are five such numbers.
A lot
There are only 999 three digit whole numbers.
There are no three didgit numbers but there are 63 three digit numbers.
171
There are 900 three-digit numbers.
300300300300
2,4,6,8,10,12,14,16,18