Can anyone tell me the name of this movie?

all i remember about this movie ( sci-fi ) is that there is a handful of people inside somekind of a cube ( kinda like the borg cube in star trek ) and they are trying to find there way out having to go through corridors and elevators that are booby trapped. I also remember that one of them starts to figure out timing and directions with numbers ( which apparently he is somekind of whiz with ) and the last thing i recall was at the end of the movie some of them got to a door that opened and they could see the sun but before they were able to exit, the door closed on them and their nightmare started all over.