1 - You must select the right type of hinges. 2 - On opposite sides, the doors require different hinges. Most hinges are reversible, allowing either end to be mounted in an upright position. These cannot be reversed, so you must select the proper hinge. In this case, the hinge must be mounted so that the pin can be removed from the top.
Most hinges can have the handing reversed.
There are only a few hinges that cannot have the handing changed. To reverse the handing, remove the pin and the plug, turn the hinge over but still assembled and replace the pin in the top and the plug in the bottom. The handing is then reversed. 1, the doors are mounted on the same side, but one door opens in while the other door opens out. The outside of a door is the corridor side of an interior door and the outside of an exterior door.