How do you get by with just 4?
Day one: Wearing pants A
Day two: Wearing pants B, pants A dirty
Day three: Wearing pants C, pants A and B in wash
Day four: Wearing pants D, pants A and B drying, pants C dirty.
Day five: Wearing pants A, pants B clean, pants C & D in wash.
Day six: Wearing pants B, pants C & D drying, pants A dirty
Day seven: Wearing pants C, pants D clean, pants A & B in wash.
&etc.
I mean, it’s technically possible, but that’s just too much washing and what if something happens?