Well, consider the multiples:
[6, 12, 18, 24, 30, 36, 42, 48, 54, 60, ...]
Eventually, you run into repeating digits in the one's place.
You should be able to figure it out from there.
When a number is a multiple of 6,what are the possible values for the ones digit?
2 answers
So what you want is to...... vete ala verga i know your cheating to get the answer