Killer Sudoku, Difficulty 3

Puzzle 4255 Oct 5 October 2011
Puzzle 4265 Oct 7 October 2011
Puzzle 4275 Oct 9 October 2011
Puzzle 4285 Oct 11 October 2011
Puzzle 4295 Oct 13 October 2011
Puzzle 4305 Oct 15 October 2011
Puzzle 4315 Oct 17 October 2011
Puzzle 4325 Oct 19 October 2011
Puzzle 4335 Oct 21 October 2011
Puzzle 4345 Oct 23 October 2011
Daily Killer Sudoku