Killer Sudoku, Difficulty 3

Puzzle 7978 Oct 18 October 2013
Puzzle 7988 Oct 20 October 2013
Puzzle 7998 Oct 22 October 2013
Puzzle 8008 Oct 24 October 2013
Puzzle 8018 Oct 26 October 2013
Puzzle 8028 Oct 28 October 2013
Puzzle 8038 Oct 30 October 2013
Puzzle 8053 Nov 2 November 2013
Puzzle 8063 Nov 4 November 2013
Puzzle 8073 Nov 6 November 2013
Daily Killer Sudoku