If you want to use Select, the second argument must be a function. For example:
Select[Range[0, 100], Divisible[#, 3] &]
returns:
{0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, \
54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, 96, 99}