Killer Sudoku, Difficulty 3

Puzzle 5415 May 25 May 2012
Puzzle 5425 May 27 May 2012
Puzzle 5435 May 29 May 2012
Puzzle 5445 May 31 May 2012
Puzzle 5450 Jun 1 June 2012
Puzzle 5460 Jun 3 June 2012
Puzzle 5470 Jun 5 June 2012
Puzzle 5480 Jun 7 June 2012
Puzzle 5490 Jun 9 June 2012
Puzzle 5500 Jun 11 June 2012
Daily Killer Sudoku