1000...
0600-0699
1600-1699 and so on.
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There are a handful of six digit numbers that have no numbers repeating. Some examples are 123456, 234567, 345678, 456789, 567012, 654321, 765432, 876543, and 987654.
899100 of them. Only 900 of the 900000 are palindromic.
32...calculated as possibillities for the first digit: 1 (because if it was 0, it would only be a 5 digit number) x 2 possibilities for the second digit x 2 possibilities for the third digit...etc. ie, 1x2x2x2x2x2=32
6! = 720 ====
999999 is six digits and odd.