This is an excellent trick for you to perform on holiday. In it, you get a volunteer to put something of value in a hotel room safe. You then tell the volunteer to do a set of sums to get a four digit code number to lock the safe with.All this is done with you out of sight of the volunteer and not looking at the safe. But you are able to guess the code and open the safe in one try!
YOU WILL NEED
- A hotel room with a small safe in the cupboard
- A willing volunteer
- A calculator, or pencil and pen (Optional if your volunteer doesn't need them)
- Tell your audience that you are so good at safecracking that you can open a safe by instinct alone. Go into another room and stand with your back to the safe
- Give your volunteer the pencil and paper or calculator. Tell them to put an object of value to them into the safe, but not to lock it yet. Tell them they'll have to do a couple of sums to get the number to lock the safe with. Tell them to pick any three digit number where the first and last digit are 2 apart (So they can have 320, 321, or 325, but not 322 or 323). Then tell them to reverse it and subtract the smaller number from the larger one.
- Tell them to reverse the number they end up with and add the new smaller and larger numbers they have. If they have been doing their sums correctly, the volunteer should always end up with 1089 as their final number.
- Tell the volunteer to key this number in and lock the safe. Sometimes, the number flashes on the safe for a few seconds, so don't enter the room with the safe in untill you are sure (Or told) that the number has gone
- Remind the volunteer that you have not been watching them, or the safe at all. When they confirm this, key in 1089, and wait for the safe to open. When it does, tell them to get better locks and give their object back to them
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