RE: Puzzle Contest #12 - First to get all the correct answers wins 5 SBD, all attempts will receive an upvote.

[mdenny]

Answer 1a :23 , 1b: 7, 1c: 18
Answer 2a : 24 , 2b: 54 , 2c: 9
Answer 3: C
Answer 4a: -5, 4b: 4