000
102 is the smallest three digit number with different digits.
smallest 8 digit number with three different digits
102
638
102
The greatest 9-digit number using three different digits is 999888777, formed by using the digits 9, 8, and 7 in descending order. The smallest 9-digit number using three different digits is 100000000, created with the digits 1, 0, and 0. This arrangement ensures that the number starts with 1, followed by the zeros to maintain the smallest value.
10002
100,002.
All five digit numbers have three digits. The smallest five digit whole number is 10,000
How about 256
There are only two smaller 3-digit numbers and both of them have repeated digits.
1023456789