check your answer here
It is already available at the 39 clues mission.
Budapest
Fort Knox
There is no misssion 12 in the 39 clues.
In Mission 4 of "The 39 Clues," the answer to the safe combination is "4-2-3." Players must solve various clues and puzzles throughout the mission to piece together the correct numbers. This combination is essential for progressing in the storyline and unlocking important information.
it should turn on by its self.
There is no cheat in any games in the 39 clues.
There is no cheat in any mission in any 39 clues game!
There are absolutely no cheats for the 39 clues website. AT ALL!
There is no cheat in any 39 clues game!
There is no cheat in any game in the 39 clues.
you have two fit pieces in all the places