Is the function even, odd, or neither

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.