10,001
-10001
The smallest 5 digit odd number is: 10001 The greatest 4 digit even number is: 9998 Subtracting 9998 from 10001 gives you 3.
11111
Oh, what a delightful question! The smallest 5-digit odd number is 10,001. It has five digits, and it's odd because the last digit is 1, which makes it not divisible by 2. Isn't it just a happy little number?
As the number is odd it must end in an odd digit; the odd digits are 1, 3, 5, 7, 9 and the smallest is 1 which is the sum of 1 and 0. Thus the smallest 7-digit number which meets your criteria is 1,001,001
-74918
100,000 + 99,999 = 199,999
1
00000 or 11111
13,579 or .13579 . If I'm allowed to repeat digits, then you are 11,111 or .11111 .
-74918
The smallest, positive 5-digit whole number is 10,000