1-301 times
Assuming you mean in the numbers 1, 2, 3, ..., 998, 999, 1000 then the digit 0. (The digit 1 appears 301 times, the digits 2-9 all appear 300 times each, but the digit 0 only appears 192 times.)
What is the units digit of the least whole number greater than 1000 whose digits are all different?
There are 3168 such numbers.
All the numbers between 999 and 3000 are four-digit numbers. You need to subtract 3000 - 999 - 1. The extra -1 is to account for the fact that the numbers 999 and 3000, in this case, are not included.
Zero
1-301 times
Assuming you mean in the numbers 1, 2, 3, ..., 998, 999, 1000 then the digit 0. (The digit 1 appears 301 times, the digits 2-9 all appear 300 times each, but the digit 0 only appears 192 times.)
9
1000
1000
1000
2000.The smallest four-digit number there can be is 1000. So, add 1000 and 1000 to get 2000, then least sum you can get when adding two four-digit numbers.
1000 + 1000 = 2000
91 * * * * * That is clearly a nonsense answer. There are at least 100 between 700 and 799! The correct answer is 271.
There are 900 three-digit whole numbers between 1 and 1000
By including the number 1000, the digit 1.