Pensez-vous avoir ce qu'il faut pour réussir un entretien d'embauche ? Mettons votre cerveau à l'épreuve avec 8 casse-têtes complexes que les recruteurs adorent présenter aux candidats ! Ce ne sont pas des questions banales - elles vous pousseront à penser de manière originale, à résoudre des problèmes de façon créative, et peut-être même à rire de leur difficulté. Que ce soit pour déterminer combien de balles de golf tiennent dans un bus ou résoudre une énigme sur des pirates partageant un trésor, ces casse-têtes sont conçus pour défier votre logique et votre vivacité d'esprit. Même si vous n'êtes pas en quête d'emploi, c'est un moyen amusant de vérifier à quel point vous êtes vif sous pression. Alors prenez un stylo, échauffez votre cerveau, et voyez si vous pouvez tous les résoudre - bonne chance, génie ! Animation créée par Sympa.
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Musique par Epidemic Sound https://www.epidemicsound.com
Pour ne rien perdre de Sympa, abonnez-vous!: https://goo.gl/6E4Xna
----------------------------------------------------------------------------------------
Nos réseaux sociaux :
Facebook: https://www.facebook.com/sympasympacom/
Instagram: https://www.instagram.com/sympa.officiel/
Stock de fichiers (photos, vidéos et autres):
https://www.depositphotos.com
https://www.shutterstock.com
https://www.eastnews.ru
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Si tu en veux encore plus, fais un tour ici:
http://sympa-sympa.com
Category
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FunTranscript
00:00A puzzle is an excellent tool to challenge the ability of someone to think creatively and rationally.
00:06This is why many companies like Apple, Microsoft and Facebook are known to offer difficult recruitment puzzles to their candidates.
00:14However, in recent years, the giants of commerce have apparently abandoned this practice.
00:19Google has even described these puzzles as a waste of time, because they predict nothing about the future performance of the candidate and only serve to feed the ego of the interviewer.
00:29But it's still intriguing to know if you could solve these puzzles, isn't it? So, let's find out!
00:36It is said that Microsoft and Amazon used this puzzle during their interviews.
00:40You are given eight balls that look like each other. One of them is heavier than the other seven.
00:46You have a simple mechanical balance and you can only weigh two. Can you find the heaviest ball?
00:52Let's name the balls from 1 to 8. First, we should put balls 1, 2 and 3 on the first side of the scale and balls 4, 5 and 6 on the second side.
01:08If these two groups have an equal weight, it means that the heavy ball is either 7 or 8.
01:13In this case, all we have to do is weigh the remaining two balls and determine which one is the heaviest.
01:20But let's talk about another scenario. Let's assume that one of the groups of three balls on the scale is heavier. The desired ball must be here.
01:28Now, you just have to weigh two of these balls to reveal which one is heavier. If the two balls have the same weight, then the desired ball is the one that remains unweighed.
01:40Today, according to rumors, Elon Musk does not interview each employee. But it seems that when he did, he posed this puzzle.
01:48You stand somewhere on the surface of the earth. You walk 1.6 km to the south, then 1.6 km to the west and then 1.6 km to the north. And you find yourself at the same place where you started. Where are you?
02:07The most obvious answer is the North Pole. Congratulations, it's correct.
02:12But according to Musk's biographers, when he heard this answer, he also asked, where else could you be? What would you say?
02:25Let's take a look at the latitude circle near the South Pole, which has a circumference of 1.6 km.
02:31From any point in this circle, walking 1.6 km west along this circle will bring you back to the same point.
02:38Therefore, any point located 1.6 km north of this latitude circle is a possible solution to the puzzle.
02:44There is another option. You could be anywhere 8 km south of the equator.
02:50In this way, your trips to the west and east rotate equally around a latitude.
02:55In addition, you could be a superhero capable of teleporting you to any point at any time.
03:01But it's a whole other game. In this case, SpaceX will probably hire you without even looking at your CV.
03:08Many employment portals mention enigma about crossing a river in various terms.
03:13Here is a clever example of these enigmas.
03:169 brothers live on an island. Their names are 1, 2, 3, 4, 5, 6, 7, 8 and 9.
03:25They must cross a river.
03:27They have a single boat that can carry them from one bank to the other, but it can only accommodate a maximum of 3 brothers at a time.
03:34In addition, the boat cannot sail alone, so a brother must pilot it.
03:39There is an additional condition.
03:41The sum of the numbers of the names of the brothers crossing the river must be a perfect square number.
03:46What is the minimum number of routes necessary to send all the brothers to the other side of the river?
03:58On the first trip, send brothers 2, 5 and 9.
04:02The sum of these numbers is 16, which is 4 times 4.
04:05Then, send 9. This will be the second trip.
04:08On the third trip, send 3, 4 and 9.
04:12Again, the sum of their numbers is 16, which corresponds perfectly to the condition.
04:17On the fourth trip, send 9.
04:20And on the fifth trip, send 1, 7 and 8.
04:23The sum of these numbers is still 16.
04:25On the sixth trip, return 1 to the island.
04:29And finally, on the seventh trip, send 1, 6 and 9.
04:33The sum of these numbers totals 16, which is still a square number.
04:38So it takes at least 7 trips to get all the brothers across the other side of the river.
04:43The media reported that LinkedIn used the following puzzle during its hiring interviews.
04:48You are in a room with 3 levers.
04:51In the next room, there are 3 fountains.
04:53Each lever activates a fountain.
04:55Your task is to discover which lever controls which fountain.
05:00You cannot see from one room to the other.
05:02And the 3 fountains are off.
05:04You can only inspect the other room once.
05:07What would you do?
05:14Let's call levers 1, 2 and 3.
05:17Leave the first lever off.
05:19Turn on lever 2 for 10 minutes.
05:21Then turn it off and quickly turn on lever 3.
05:24Enter the room.
05:26Find the fountain that is still wet but does not work.
05:29It is the one controlled by lever 2.
05:31The one that is currently working is linked to lever 3.
05:34And the last one is linked to the first lever.
05:38This logical exercise from the 60s is called the Watson selection task.
05:43Be careful.
05:44It is quite delicate.
05:45Even math students cannot solve it.
05:49There are 4 cards.
05:50Each card has a letter on one side and a number on the other side.
05:54There is only one rule.
05:56Each card with the letter D on one side must have the number 3 on the other side.
06:01Can you guess which card or which card must be turned over?
06:05To check if the rule has been respected.
06:14You must check 2 cards.
06:15D and 7.
06:17Most people suggest choosing cards D and 3.
06:20But this answer is incorrect.
06:22Let's review each card to understand the logic.
06:25The rule says.
06:26If a card is D, it must have 3 on the other side.
06:29So, we have to check the first card to make sure there is a 3 on the other side.
06:34The second card shows the letter K.
06:37We don't know anything about the other letters.
06:39So.
06:40It doesn't matter what's on the other side.
06:42Because none of the Ks violates the rule.
06:44So we can ignore it.
06:46We.
06:46We know that some cards with the number 3 will have the letter D on the other side.
06:51But we don't know if it's true for all cards with D3.
06:54So it doesn't make sense to check the 3rd card.
06:58And finally.
06:59The 4th card.
07:00If we find the letter D on the other side, it would violate the rule.
07:04Because there is a number 7 on the opposite side.
07:06So, we should only check these 2 cards.
07:11Here is another informal variant of the previous game.
07:14There are 4 cards representing different people.
07:18One side shows their favorite drink.
07:20And the other side.
07:21Their age.
07:22The city has a rule stipulating that everyone who drinks lemonade must be over 20 years old.
07:28Which card should you return to ensure that the rule is respected?
07:38You don't need to check that the lemonade card is the card with the number 16.
07:42Obviously.
07:43You must make sure that the consumption of lemonade is greater than 20.
07:47And you must make sure that the 16-year-old person does not drink lemonade.
07:51The person who drinks coffee can be of any age.
07:54And the 25-year-old person can legally drink lemonade.
07:57Most people can solve this riddle quite quickly.
08:01And it's curious because, in fact, this task is similar to the previous one.
08:04This famous puzzle was designed to test the ability to reason and recognize patterns.
08:11Three ants are at the corner of an equilateral triangle.
08:14Each ant moves in a random direction along the sides of the triangle.
08:18What is the probability that none of the ants collide with the triangle?
08:28There is a 50% chance that ants will never meet.
08:32And 50% chance that at least two of them may not meet.
08:36All ants can move either clockwise or counterclockwise.
08:41This reduces your first 50% chance that ants will never meet to a 25% chance.
08:49And here is an example of a delicate formulation question.
08:52What are the two words that, when combined, contain the most letters?
09:02Post and office.