All five digit numbers have three digits. The smallest five digit whole number is 10,000
11112
It is difficult to interpret exactly what you are trying to ask. If you allow your five digit number to have leading zeroes and do not allow negative numbers, then 00000 - 99999 = -99999 is the smallest number. If you do allow negative 5 digit numbers, then (-99999) - 99999 = -199998 is the smallest number.
51111 is the smallest five digit number that can be rounded to 60000
199999.
23458
With a total of 90,000 five digit numbers, we can conclude that there is 45,000 EVEN five digit numbers.
10023?
0.00001
10001
10000
12354.