Killer Sudoku, Difficulty 3

Puzzle 5120 Mar 27 March 2012
Puzzle 5130 Mar 29 March 2012
Puzzle 5140 Mar 31 March 2012
Puzzle 5145 Apr 1 April 2012
Puzzle 5155 Apr 3 April 2012
Puzzle 5165 Apr 5 April 2012
Puzzle 5175 Apr 7 April 2012
Puzzle 5185 Apr 9 April 2012
Puzzle 5195 Apr 11 April 2012
Puzzle 5205 Apr 13 April 2012
Daily Killer Sudoku