Hunter x Hunter (2011) - episode 12 - 17 Dec, 2011

The team waits in a room for 50 hours, and then face a predicament right before the end. The group is challenged, having to choose between a short and easy route, which only three can enter, or a long and hard path, which all members of the group can enter. Gon comes up with the idea to choose the long route, and axe the wall dividing them between the short path, and all five of them make it down the base of the tower in time. (Source: Wikipedia) Hunter Exam arc: (12/21)