Killer Sudoku, Difficulty 3

Puzzle 7263 May 28 May 2013
Puzzle 7273 May 30 May 2013
Puzzle 7288 Jun 2 June 2013
Puzzle 7298 Jun 4 June 2013
Puzzle 7308 Jun 6 June 2013
Puzzle 7318 Jun 8 June 2013
Puzzle 7328 Jun 10 June 2013
Puzzle 7338 Jun 12 June 2013
Puzzle 7348 Jun 14 June 2013
Puzzle 7358 Jun 16 June 2013
Daily Killer Sudoku