102
There are only two smaller 3-digit numbers and both of them have repeated digits.
none
The largest ten digit number with no repeated digits is '9876543210'.
222335
Since there are only five different digits, a 6-digit number can only be generated if a digit can be repeated. If digits can be repeated, the smallest 6-digit number is 111111.
0123456789
10234567
102
100,000,000,000
Oh, what a happy little question! To find the smallest 6-digit number with no repeated digits, we start by using the digits 1-9 in ascending order. So, the smallest 6-digit number with no repeated digits is 123,456. Just imagine all the beautiful possibilities that number holds!
The first digit would have to be 1, the remaining digits, zero.
There are only two smaller 3-digit numbers and both of them have repeated digits.
none
102345 is the smallest [positive] 6-digit number with no repeats.
1000000000 or, if negative numbers are permitted, then -9999999999
111111. Since there are six digits, there must be a repeated digit, so why not repeat all ones to get the smallest one.