what day of the week are you most free?

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. On what day of the week do you have the most free time?
  2. On what day of the week are you most free?
  3. There are a lot of shoes in front of the house, I wore one wrong shoe and ended up wearing two different shores. I mixed them up by mistake.

Are the above sentences written correctly?

2
  1. On what day of the week do you have the most free time?
  2. On what day of the week are you most free?
  3. There are a lot of shoes in front of the house, I wore a wrong pair. I had mixed them up by mistake.
3
  1. is correct
  2. On what day of the week are you free the most? (This is more informal and it would be better to use example 1.)
  3. There are a lot of shoes in front of the house. I wore two odd shoes by mistake.