Hacks and Puzzles: The hallway between Buildings 16 and 56 features a puzzle on the floor, as well as murals describing the Institute’s hacking history. Yuanyu CHen—The Tech May. 9, 2016 Facebook Twitter Reddit Print Hacks and Puzzles: The hallway between Buildings 16 and 56 features a puzzle on the floor, as well as murals describing the Institute’s hacking history. Yuanyu CHen—The Tech