[Note: This kind of puzzles, published in the dailiy newspaer USA Today (2024) is due to Davide Coppo (where there are always 4 by 4)]

Easy Puzzles

• Easy Problem 1
• Easy Problem 2
• Easy Problem 3
• Easy Problem 4
• Easy Problem 5
• Easy Problem 6
• Easy Problem 7
• Easy Problem 8
• Easy Problem 9
• Easy Problem 10

Harder Puzzles

• Harder Problem 1
• Harder Problem 2
• Harder Problem 3
• Harder Problem 4
• Harder Problem 5
• Harder Problem 6
• Harder Problem 7
• Harder Problem 8
• Harder Problem 9
• Harder Problem 10