Six in Six

Yo yo everyone! 

Contest for y'all: solve these six puzzles. You have six days (until 7/16) and no outside assistance pl0x). Multiple submissions are allowed, and if you're missing a variation, I'll probably just ask you about the variation (especially for problem 3).

Prizes for solving the most puzzles, special prizes for finding cooks and for solving all of them. (Warning: some would consider the prizes to be negative utility).

Some of the puzzles are deep, some are simple, some are aesthetic, and some are a jumble of variations.