keto deluxe reviews 5. Logical puzzles for the development of innovative thinking.With the help of fascinating logical puzzles, you can test the ability to use the information received for a coherent answer to a question. Logic puzzles are useful for training non-standard thinking and strengthening memory.They are ideal for older people, since they require extraordinary reasoning - this will activate neural pathways that are most likely not been used since retirement. Books with such assignments can be found on the Internet or in a bookstore. The example below will tell you where to start.