|
|
| Enigma 1 | Facts: | Somebody lost an object on the carpark while leaving his building, it had the object in his hand right after having crossed the threshold of the building. While arriving at her car, before opening the door of her vehicle, this person realized that the object was not any more in its hands. After having several times the course remakes go and return which it had just made, it did not find its object. However, approximately 3 weeks later, this person finds the object in her car. |
| Question: | How an object lost on a carpark can be found later in a car, especially when the person excavated her vehicle meanwhile? |
| Enigma 2 | Facts: | A motorist rolls on a small sinuous road, a car precedes it, while rolling to 80 km/h it joined the first car, while rolling to 60 km/h it still joined this car, while rolling to 30 km/h, it still catches up with the car which precedes it, it stops, the car in front of him stops, it sets out again, the other car sets out again. |
| Question: | Why a motorist can always catch up with the car which precedes it while slowing down? |
| Enigma 3 | Facts: | A person having a computer has, one evening, started her computer with a diskette of starting. With a utility it seeks the files modified the very same day. Only one file was modified, it acts of the file which contains its password of opening of session (user. PWL). Moreover the hour of modification corresponds to one hour when the PC was extinguished and where there was nobody in the apartment. Of course the user did not modify his password this day there. |
| Question: | How a file can indicate a date of modification to a given moment where the PC is extinguished, nobody is in the apartment, and the PC is of course up to date and per hour? Why only the file containing the password of opening of session? |
| Enigma 4 | Facts: | A smoker, to have fun, breath in a cigarette, it notices at once that the reddening of the part lit of the cigarette, is identical to that obtained when it smokes the cigarette normally. It deduces from it that it would be easy to simulate, to make seeming, to smoke a cigarette, except that obviously any smoke does not leave its mouth, and an informed eye will be able to notice the swelling of the cheeks when it blows. But this recreation him recall the memory of a person who had shown a particular method to smoke joined. This person placed her joint between her major and the annular one, it joined its two hands in front of its mouth, hiding very well this one, reddening was clearly visible, and the person allowed herself to add to high way: “by keeping smoke, that made more effect”. Would not be the best method there to make pretense smoke a joint? The hands in front of the mouth can hide the blowing made in the joint and obviously, it is impossible in this case to expire of smoke because no smoke was aspired, this person found an excuse besides, and visually the illusion is nearly perfect. It thus possible to make pretense smoke a joint. |
| Question: | Why a smoker of joint as many make does efforts to make pretense smoke the joint, than it “rolled” itself besides, while being of course prompt to divide it with the immediate entourage? |
| Enigma 5 | Facts: | While wanting to modify a file, a user of a PC, noticed that the date of modification of its file USER.PWL which contains the password of its session had a date of modification which did not correspond to the last time where it had modified his password. After several days of monitoring of the date of modification of this file, it notices that the date changed all alone frequently. It began a procedure of research of the process which could modify this date. After having made various starting tests from the PC and various tests of execution of application by supervising very ready date of its file USER.PWL, it can approach the following discovery: With each time it carries out its navigator and that it is connected to Internet, the date of modification of its file USER.PWL is modified and corresponds to the moment when it was connected. With each connection Internet the file which contains its password of opening of session is at least read. While seeking if other files are them also reached the same moment, it does not find any other of it, therefore only the password of opening of session seems to interest possible “a hacker” which would have succeeded in installing a process to read this file and thus to recover its contents which is not something randomly, then that it is the password of opening of session which protects the access to the computer. |
| Question: | Which interest can have a “hacker” by recovering by Internet the password of opening of session since it will not be able to use it that if it can settle locally in front of the computer which uses this password? |
Enigma 6  |
Facts: | By doing the housework at it, a woman finds between the cushions of the settee a bunch of keys. After having asked around it, with all the people whom it knows, no person is the owner of this bunch of keys. She arranged this bunch of keys in the wall cupboard. However recently, it is impossible of finds this bunch of keys for him. |
| Question: | How can a bunch of keys which seemingly does not belong to anybody known of this woman be lost at it, and where the bunch of keys passed? |