Killer Sudoku, Difficulty 3

Puzzle 7778 Sep 8 September 2013
Puzzle 7788 Sep 10 September 2013
Puzzle 7798 Sep 12 September 2013
Puzzle 7808 Sep 14 September 2013
Puzzle 7818 Sep 16 September 2013
Puzzle 7828 Sep 18 September 2013
Puzzle 7838 Sep 20 September 2013
Puzzle 7848 Sep 22 September 2013
Puzzle 7858 Sep 24 September 2013
Puzzle 7868 Sep 26 September 2013
Daily Killer Sudoku