Killer Sudoku, Difficulty 3

Puzzle 5315 May 5 May 2012
Puzzle 5325 May 7 May 2012
Puzzle 5335 May 9 May 2012
Puzzle 5345 May 11 May 2012
Puzzle 5355 May 13 May 2012
Puzzle 5365 May 15 May 2012
Puzzle 5375 May 17 May 2012
Puzzle 5385 May 19 May 2012
Puzzle 5395 May 21 May 2012
Puzzle 5405 May 23 May 2012
Daily Killer Sudoku