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Last safe combination
Go to the violet room. Unlock the doors with all the triple keys. Enter the doors to discover a secret room with the last safe. The combination is "3528".
If you need to reset a puzzle, back away from it, then zoom in on it again. Note: Do not leave while cracking a three-key safe until all three keys are in your inventory as this may cause one to be lost.
Room 5: Abraham's Switch Safe diagram
In Room 5 , the constructor's office, zoom in on the
drafting table to the right of the safe to find the diagram for
Abraham's Switch Safe.
Room 21: Opening the refrigerator safe
In Room 5, the Kitchen, zoom in on the controls on the refrigerator safe. Use the temperature formulas to calibrate the mechanism to open it. The following temperatures are all equivalent:
- 10 degrees Celsius
- 50 degrees Fahrenheit
- 283 degrees Kelvin
In Room 46, the music chamber, there are various musical instruments in this room which are played when selected. Zoom in on the tape recorder on the north side of the room and select the "FORW" button to play the fourteen notes of "Twinkle, Twinkle Little Star". Remember the number of notes.