Why live in a boring rectangular-shaped condo when you can live in the 'Number Residence?' Located in Osaka, Japan, this digit-loving home has a design that was conceived by Japanese architect Matsunami Mitsutomo.
In the gallery above, you'll see the final product of the building but also included is the floor plan of the 'Number Residence.' You can make out the numbers 3, 5 and 2, but the last one is hard to make out. What number do you think the last one is?