Find the difference between the smallest number of six-digits and the greatest number of five-digits.
The smallest number of six-digits: 100000
The greatest number of five-digits: 99999
Their difference: 100000-99999
=1
Hence their difference is 1.
Find the difference between the greatest and the smallest 6-digit number using the digits 0,1,3
Find the difference of the greatest number of six digits and the smallest number of seven digits.