This is the UN Identification Number.
Assuming that the first digit of the 4 digit number cannot be 0, then there are 9 possible digits for the first of the four. Also assuming that each digit does not need to be unique, then the next three digits of the four can have 10 possible for each. That results in 9x10x10x10 = 9000 possible 4 digit numbers. If, however, you can not use the same number twice in completing the 4 digit number, and the first digit cannot be 0, then the result is 9x9x8x7 = 4536 possible 4 digit numbers. If the 4 digit number can start with 0, then there are 10,000 possible 4 digit numbers. If the 4 digit number can start with 0, and you cannot use any number twice, then the result is 10x9x8x7 = 5040 possilbe 4 digit numbers.
It is 0.000009 approx.
2222
How many four digit combinations can be made from the number nine? Example, 1+1+2+5=9.
It is: 1009
Even number are those that can be divided by 2.First 4-digit number is 1000 but this is not oddSo, the least 4-digit odd number is 1001
1024
1024
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.
1,024
1023
1023
0.124
Four. (100 x 10 = 1,000)
1005
it is 2