[If we] Should work with three digit numbers divisible by three, what would be
the initial and final value of the counting variable?
The smallest and largest three digit numbers, respectively, are 100 and 999.
We divide each by 3
33 333
3)100 3)999
9 9
10 9
9 9
1 9
9
0
100 leaves a remainder, so we increase 33 to the next integer, 34 and multiply
that by 3 and get 102, so that's the initial three digit number divisible by 3.
Since 999 did not leave a remainder, it's divisible by 3, so it's the final
value of the counting variable.
Answers: 102 and 999
Edwin