165 is a puzzle ID number. In the various games, it may refer to one of these puzzles:
- 165 - One Big Necklace in the game Professor Layton and the Unwound Future.
- 165 - Three Blocks in the game Professor Layton and the Last Specter.
- 165 - A Troublesome Table in the game Professor Layton and the Azran Legacy.
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