If not, do the lipstick test. Smear lipstick on the latch and stick masking tape to the strike plate. As you close the door the lipstick will stain the part of the masking tape it touches ...

This is the best way to fix a door with the type of hinges that do not have removable pins. Half of the door stop is screwed to the lower corner of the door. The other half—the door stop—is ...