Many airports have intersecting runways to account for changing wind directions.
Are you talking about a two strip airfield on a cattle station in the Northern Territory with once a month traffic, or something else?
Your "gotcha" class question isn't especially well formed.
Everyone is stomping their feet saying the answer should be more than the number which has not yet been disclosed, so we don't know, but yet everyone also refuses to provide a definite number.
So tell me, for an airport that only has two runways which intersect, at LGA's volume, what is the correct number of controllers that should be working that field?
This also assumes the FAA hasn't already done this math and the gaming-chair experts know more than the FAA (which they don't).