Light Switches Clues
Scroll down for more clues and the answer.
Clue 1
Up is on. Take the binary value of all the switches in the on position.
Clue 2
Add the value of all the on switches together to give you a 3-digit code.
Answer
If a switch is showing as on take the binary value as shown on the clue you found. Add them all together to get 105.