There are actually 8,998 of them . . . all of the counting numbers from 1,000 to 9,999 .
The list is too large to present here, but if you can count, then you'll have no trouble
generating it on your own.
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3.918208205 X 10^11 I think but I'm stupid so probably wrong
it is 26
== I suggest starting with a pen and a piece of paper. == Any number which is above 9 isn't a digit (in denary) None of the numbers from 1 to 45 are 7 digits long
There are twelve possible solutions using the rule you stated.
It can be calculated as factorial 44! = 4x3x2x1= 60