The smallest 3-digit palindrome is 101.
5335
Any number that is is a palindrome will always be a palindrome.
-1
A palindrome reads the same forward and in reverse. This tells me that at leastthe first digit and the last digit must be the same. So it's not possible to have a6-digit palindrome "with no same digits".The largest 6-digit palindrome, with just enough repetition of digits to make it apalindrome and no more, would be 987,789 .
101
1, 2, 3
No.
9999
Eleven
999999
You cannot make a palindrome with 3 different digits. You can only do that if you have a set of paired digits, and at most one single digit.