Answer :
Whole number means that we cant use coma, so smallest six digit whole number is 100000 and the greatest four digit is 9999.
Now we have to just subtract 100000 and 9999 to see the difference, so
100000-9999=90001 - its the result.
Now we have to just subtract 100000 and 9999 to see the difference, so
100000-9999=90001 - its the result.