Killer Sudoku, Difficulty 3

Puzzle 5510 Jun 13 June 2012
Puzzle 5520 Jun 15 June 2012
Puzzle 5530 Jun 17 June 2012
Puzzle 5540 Jun 19 June 2012
Puzzle 5550 Jun 21 June 2012
Puzzle 5560 Jun 23 June 2012
Puzzle 5570 Jun 25 June 2012
Puzzle 5580 Jun 27 June 2012
Puzzle 5590 Jun 29 June 2012
Puzzle 5600 Jul 1 July 2012
Daily Killer Sudoku