It is difficult to interpret exactly what you are trying to ask. If you allow your five digit number to have leading zeroes and do not allow negative numbers, then 00000 - 99999 = -99999 is the smallest number. If you do allow negative 5 digit numbers, then (-99999) - 99999 = -199998 is the smallest number.
99997
There are 2000 such numbers.
9876543210
125
Assuming that numbers with a leading zero is not permitted, the answer is 9*9! = 3,265,920. If leading 0s were permitted, the answer would have been 3,628,800
The number of six digit numbers that you can make from ten different digits ifrepetitions of same digit on the six digit number is allowed is 1 000 000 numbers(including number 000 000).If no repetitions of the the same digit are allowed then you have:10P6 = 10!/(10-6)! = 151 200 different six digit numbers(six digit permutations form 10 different digits).
1023456789
There are eighteen of them.
-123456786
99997
If you don't mind beginning the 4-digit number with one or more zeros, thenthere are 10 choices for each digit, and the total number of possibilities is:(10 x 10 x 10 x 10) = 10,000 .If the 4-digit number can't begin with a zero, then there are only 9 choices forthe first digit, but 10 choices for each of the others, and the total number ofpossibilities is:(9 x 10 x 10 x 10) = 9,000 .
It is difficult to interpret exactly what you are trying to ask. If you allow your five digit number to have leading zeroes and do not allow negative numbers, then 00000 - 99999 = -99999 is the smallest number. If you do allow negative 5 digit numbers, then (-99999) - 99999 = -199998 is the smallest number.
943
4
It is 963.
99997