RE: Puzzle Contest #10 - First to get all the correct answers wins 5 SBD, all attempts will receive an upvote.

[andronicionut]

My answers.
Answer 1: c
Answer 2: 1
Answer 3: 21, 111, 17, 75
Answer 4: 100m winner is Mike. 100m winning time is : 2.38
50m winner is Mike. 50m winning time is : 1.31