I apologize for the ambiguity of the question title.
I have a dropdown list which users must select from. The list goes from 0-55 in increments of 5.
- In my specific case, the dropdown represents fuel remaining in an aircraft.
- 0 and 55 are both valid but highly unlikely choices, since these aircraft are almost never completely empty and also almost never full after a flight is completed.
- I don't really care whether the "extra" item occurs at 0 or at 55, I'm only interested in making it simple and usable.
- I have no choice - I must use a dropdown list. I can choose the increments but 5 is "normal" for this specific case.
My choices are:
0-5 6-10 11-15 ... 51-55
0-4 5-9 10-14 ... 50-55
Which is easier for users?