Variations on Junior Sudoku Logic Puzzles (Vol 1) 
 Chapter 11: Twenty-Four Medium Sudoku-5 Puzzles (numbers 145-168) 
 
-  Step-by-step instructions for solving  Puzzle 145, (16/25)   Diff: 5/4.3252
 -  Step-by-step instructions for solving  Puzzle 146, (16/25)   Diff: 5/2.4235
 -  Step-by-step instructions for solving  Puzzle 147, (18/25)   Diff: 5/7.3422
 -  Step-by-step instructions for solving  Puzzle 148, (18/25)   Diff: 5/5.3361
 -  Step-by-step instructions for solving  Puzzle 149, (19/25)   Diff: 5/5.4451
 -  Step-by-step instructions for solving  Puzzle 150, (19/25)   Diff: 5/5.4442
 -  Step-by-step instructions for solving  Puzzle 151, (19/25)   Diff: 5/4.5343
 -  Step-by-step instructions for solving  Puzzle 152, (19/25)   Diff: 5/4.3561
 -  Step-by-step instructions for solving  Puzzle 153, (19/25)   Diff: 5/3.5542
 -  Step-by-step instructions for solving  Puzzle 154, (20/25)   Diff: 5/4.5542
 -  Step-by-step instructions for solving  Puzzle 155, (20/25)   Diff: 5/4.5533
 -  Step-by-step instructions for solving  Puzzle 156, (18/25)   Diff: 6/22.3461
 -  Step-by-step instructions for solving  Puzzle 157, (19/25)   Diff: 6/54.1351
 -  Step-by-step instructions for solving  Puzzle 158, (19/25)   Diff: 6/43.1362
 -  Step-by-step instructions for solving  Puzzle 159, (19/25)   Diff: 6/34.5232
 -  Step-by-step instructions for solving  Puzzle 160, (19/25)   Diff: 6/22.4551
 -  Step-by-step instructions for solving  Puzzle 161, (19/25)   Diff: 6/22.1563
 -  Step-by-step instructions for solving  Puzzle 162, (20/25)   Diff: 6/53.3522
 -  Step-by-step instructions for solving  Puzzle 163, (20/25)   Diff: 6/35.4422
 -  Step-by-step instructions for solving  Puzzle 164, (20/25)   Diff: 6/35.4332
 -  Step-by-step instructions for solving  Puzzle 165, (20/25)   Diff: 6/35.3333
 -  Step-by-step instructions for solving  Puzzle 166, (20/25)   Diff: 6/32.4461
 -  Step-by-step instructions for solving  Puzzle 167, (20/25)   Diff: 6/24.3344
 -  Step-by-step instructions for solving  Puzzle 168, (20/25)   Diff: 6/11.3474