How many of the natural numbers from 1 to 800 inclusive, contain the digit 6 at least once?
There are 19 integers between 1 and 100 with at leat one 6.
19 x 7 ==133 between 1 and 800
there are 100 numbers between 600 and 699
Total ==133 + 100 ==233 integers that have at least one 6
