Two versions of this question have been merged ... the one that asks for
the smallest 5-digit number, and the one that asks for the largest.
If we're talking integers (whole numbers), then
-- the largest 5-digit number with no repeating digits is 98,765 .
-- the smallest one is 10,234 .
-- If decimals are included, then the largest number is the same,
but the smallest one is .01234 .
1023459
12345 but if you can use a decimal, then 0.1234 would be the smallest possible number.
9876543210
Including the leading zero, the smallest number you can make from the digits 03418 is 01348. Without the leading zero in the ten thousands column, the smallest number you can form from the digits 03418 is 10348.
If leading 0s are permitted then 0247 is smallest. If not, 2047
It is 0.123459
1023459
1,023,456,789
102345
10,234 is the smallest 5-digit number meeting your restrictions.
4321
86420
12345 but if you can use a decimal, then 0.1234 would be the smallest possible number.
10234 If you're cheap, you can go 01234
987654
12354.
The smallest possible 9 digit number (assuming negatives are not allowed) is 102,345,678 in which 5 is in the thousands' place.