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256
6
976542
502 205 250 520 4 numbers. If a leading zero is allowed then you can have 052 and 025 for 6 numbers.
9876543210, without using any mathemeatical operations.
256
1023459
96425 Larger numbers can be made by cascading the powers, but not on here because the notation won't take it.
86420
6
976542
It is 0.123459
9876543210
There are 7,290 different 4-digit numbers that can be formed from the digits 1-9 without repetition.
There are 25 such numbers.
873 is.
id say, 0123456789. but depends how many digits you can have