Killer Sudoku, Difficulty 3

Puzzle 7878 Sep 28 September 2013
Puzzle 7888 Sep 30 September 2013
Puzzle 7898 Oct 2 October 2013
Puzzle 7908 Oct 4 October 2013
Puzzle 7918 Oct 6 October 2013
Puzzle 7928 Oct 8 October 2013
Puzzle 7938 Oct 10 October 2013
Puzzle 7948 Oct 12 October 2013
Puzzle 7958 Oct 14 October 2013
Puzzle 7968 Oct 16 October 2013
Daily Killer Sudoku