The puzzles cannot be solved on line 

Puzzles and solutions 1-15		Puzzles and solutions 16-30
Puzzles and solutions 31-45		Puzzles and solutions 46-60
Puzzles and solutions 61-75		Puzzles and solutions 76-90
Puzzles and solutions 91-105		Puzzles and solutions 106-120
Puzzles and solutions 121-135		Puzzles and solutions 136-150
Puzzles and solutions 151 - 165		Puzzles and solutions 166 - 180