Tics (aka tic marks) should be visible under the slider bar.

See this sketch: http://img38.imageshack.us/img38/5295/10403feb10095848.gif

benefits: easy read, make it clear it's a slider with discrete values, catch where the handle is in respect to left and right limits.

Details:
type = multiple numerical input
options:
use slider layout = 1
slider min = 0
slider max = 10
slider accurancy = 1