I became intrigued about how he had managed to get in. He told me. He had seen that the door could be opened with the keyboard system that I´d mentioned earlier when I reminded my arrival to Pacomio´s house, the one that worked dialing a four number code. The possible combinations were hundreds of them. However, they could be significantly shorten. All the buttons were filthy. Except the 3, the 5, the 8 and the 9 one, which were the ones that the real dwellers used to press to get in. Those ones, by the use, were shiny. The four tell-tale keys narrowed down the options to twenty-four attempts. The door opened at the fifteenth one.
Factorial function is a pretty math tool known from long
time ago. It is symbolised by the exlclamation point and it indicates the
number of combinationsin which you can order n objects (n!). You can calculate
it by multiplying all the whole numbers from 1 to the number. For instance, for
4 would be 4!=4x3x2x1=24. Well done, Santiago Lorenzo, the choices were of 25
attempts. And I want also ti congratulate you for this novel that has made have
a good time
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