What's the next number in the following sequence:
1, 3, 6, 7, 9, 11, 13, 14, 18, 21, 23, 28, 31, ___, ...
Not sure if this one is easy. Hints will be released gradually. First one is in the title :)
Hint #2
Depending on where you live, you may have never seen these numbers.
Additionally
Never seeing these numbers is in fact an advantage, not disadvantage.
Hint #3
No math involved (except for counting)
Hint #4
Human brain may not be enough. Ask Google or Wikipedia for help.
Final Hint
How do you search for a sequence in Google that you've never seen, or even has never existed? Google is not that powerful to find something nonexistent for you. You need to search for something else.