10 of 1 digit, 45 of 2 digits and 120 of 3 digits making 175 in all.
1000
If the numbers can be repeated and the numbers are 0-9 then there are 1000 different combinations.
109
168
There are 169.
1000
10000
If the numbers can be repeated and the numbers are 0-9 then there are 1000 different combinations.
109
168
999 of them.
There are 169.
There are 300 of them.
999
Well first you will start off with 000, then go up until 999. So there would be 1000 different combinations.
If 0 is not counted, and 1 is, then the answer is 1000.
125 if you include 1000.