While you're exploring the rather large submarine in The Mermaid Mask, you can interact with a big metal statue of a serpent in the Mess Hall room. You can choose to peer in and look closer at the cabinet that's built into the structure, leading you into the first major puzzle for the detective game that involves four numbered rotating dials with shapes inside of them.
Here's how to solve the shapes and numbers puzzle in The Mermaid Mask.
Solution to the Shapes and Numbers Puzzle in The Mermaid Mask (Mess Hall Guide)
The shapes and numbers puzzle in The Mermaid Mask might appear confusing at first, but the solution is rather simple: the numbers on each window need to match the number of sides on each shape in each respective window.
- So, for the first window on the left with the number 3, you just need one shape with three sides, which is the blue triangle.
- For the second window with the number 9, you'll need to put the orange square and the yellow pentagon (four sides plus five sides equals 9!).
- The number 7 window needs the orange square and blue triangle.
- The number 4 window just needs the orange square.
Just rotate the dials until everything is in the right spot, then click the keyhole button in the top-right corner to complete the puzzle and move on with the deadly investigation.