- 16 hours ago
Think you're smarter than an AI? Well, here's your chance to prove it! We've got some riddles lined up that even AI struggles to crack. Test your brainpower and see if you can solve these tricky puzzles.
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00:00So, John is hosting his monthly thematic dinner.
00:04Each month, he picks a different theme, and they spend the entire evening eating and laughing.
00:09He spent days searching the internet for one of the most difficult riddles he could find
00:13to give his friends a real challenge to solve.
00:16That's when he found the four glasses puzzle.
00:19His guests arrived, and he explained the rules of the game to them.
00:22They would each start the game with four empty glasses that were right-side up.
00:27In each move, they would need to invert exactly three different glasses.
00:31To win the game, the person should be able to find the minimum number of moves
00:36to get all of the four glasses facing down.
00:39Hey, do you think you can beat John's guess in solving this riddle?
00:56In the first move, you should pick any three glasses you'd like and turn them upside down.
01:02Then, the second move is where you should use a little bit more of your wits and skills.
01:07You shouldn't pick the exact same three glasses you picked in the first round, otherwise,
01:11that would take you back to the beginning.
01:14Instead, you could choose to invert the glasses 1, 2, and 4, for example.
01:19So, after move 2, you end up with the following order – up, up, down, down.
01:25Then, your best move may sound counterintuitive.
01:28But you should pick two glasses that are down and one glass that is up.
01:32In the fourth move, you should pick the three glasses that are up and invert them.
01:38This way, you'll have all four glasses facing down.
01:42Congrats!
01:43You've just shown John and his party guests that the minimum number of moves to win this
01:47game is four.
01:50Sandy was exploring the wood near her house when she discovered a magical portal.
01:55On the other side of it, she was shocked to find three of her close friends – Alex,
02:00Betty, and June.
02:01They had been captured by a trickster creature that had cast a spell on them.
02:06After that, one of them could only tell lies, the other could only tell the truth, and the
02:12third one was sort of a spy – sometimes she lied, other times she told the truth.
02:18Sandy decided to talk to each one of them.
02:21Alex said she was not the truth teller.
02:23Betty said she was not the spy.
02:26And June said she was not a liar.
02:28Can you help Sandy figure out what June was cursed with?
02:44Well, let's see how we can solve the problem.
02:47In total, there are six possibilities to consider, and we should start with the most obvious.
02:53If Alex was a truth teller, then she could not say that she is not a truth teller.
02:59She can't be the liar either, because then her statement would actually be true.
03:04So it's settled.
03:05Alex is the spy.
03:07If Betty was a liar, then she would be always lying.
03:11Saying that she is not a spy would actually be true.
03:14So this is a no-go.
03:15Since she can't be a spy, this means she's the truth teller.
03:20Bingo!
03:21This means that June is the liar.
03:25It was Blake's lucky day.
03:27He won $1,000 on a lottery ticket.
03:30Of all the things he could spend this on, he knew immediately that he wanted to spend
03:34this money buying his favorite chocolate in the world.
03:38The chocolate bar he loves cost $1, and since his luck just keeps growing, the local store
03:44is having a promotion.
03:45For every four chocolate wrappers he takes back to the store, the store will give him
03:50one chocolate bar for free.
03:52Ooh, talk about abundance!
03:54How about you show off your genius, then figure out the maximum number of chocolate bars Blake
04:00can get.
04:13Well, let's see the best he could do.
04:16If Blake spends all of his money and buys 1,000 chocolate bars, he'll have 1,000 wrappers,
04:22correct?
04:22Then, if he exchanges every four wrappers for one additional chocolate bar, he can get
04:28250 more chocolate bars from his 1,000 wrappers.
04:32Now, if Blake exchanged those 250 wrappers, he'd get another 62 chocolate bars.
04:39He'd use 248 wrappers, leaving him with the remaining two wrappers.
04:44Then, his best deal would be to take those 62 wrappers, add the remaining two he kept from
04:50the last exchange, and he would have 64 wrappers in total.
04:54He can exchange these wrappers for another 16 chocolate bars.
04:57Then, he'd take these 16 wrappers and trade them for 4 more chocolate bars.
05:02Exchanging those last four wrappers, he'd get his final chocolate bar.
05:06So, if Blake follows this process, he'll get a maximum of 1,333 chocolate bars in total.
05:14Now, we're not saying this is a smart idea, but…
05:17Your mother asks you to measure 4 cups of orange juice using 2 jugs.
05:22The thing is, you have a 20-cup jug and a 36-cup jug.
05:27How can you do it?
05:42You need to start by pouring the orange juice into the smaller jug.
05:46Then, pour all the juice from that jug into the 36-cup jug.
05:51This way, the empty space from the big jug would give you 16 cups.
05:55After doing that, you can fill the 20-cup jug using more fresh juice and pour that liquid
06:02into the 36-cup jug.
06:03That way, you'll fill the entire 36-cup jug, and what's left in the smaller jug is the
06:104 cups of juice your mom asked for.
06:13Then, you can start an orange juice stand.
06:17Sophie's aunt, Clara, bought a bottle of perfume for her niece's birthday.
06:22Unfortunately, Sophie couldn't keep it because her sister, Mia, is terribly allergic to perfumes.
06:28Sophie brought it back to her aunt, who had purchased it for $65.
06:33Aunt Clara then sold the perfume to someone else for $80.
06:38But then she remembered she had another niece, Lily.
06:41So, she bought it back from the lady for $70.
06:45However, Lily turned out to be allergic too.
06:47So, aunt Clara had to sell the perfume again, this time for $60.
06:52Did she make any profit in this whole situation?
07:07Yes, aunt Clara made a $5 profit and celebrated it by grabbing a large latte.
07:14James, a mad scientist, was on a quest to solve a crazy problem from a friend.
07:20Again, this challenge had him stopping everything just to figure it out.
07:24James had two stacks of cups to analyze.
07:27One stack had five cups piled on top of each other, reaching a total height of 13.5 inches.
07:33Right next to this stack, there was another stack with just two cups,
07:38totaling 7.5 inches in height.
07:55James needed to figure out how tall a single cup was.
07:59At first glance, it might seem like you could just divide the total height by the number of cups.
08:04But that wouldn't work here.
08:07Instead, James thought about the problem differently.
08:10He considered the height of a single cup as XX,
08:13and noticed that each cup didn't sit perfectly on top of each other.
08:17There was a bit of overlap.
08:19For the two-cup stack, the combined height is 7.5 inches.
08:24This includes the full height of the first cup,
08:26plus the part of the second cup that sticks out just above the first cup.
08:31The five-cup stack, which is 13.5 inches tall,
08:35includes the height of the two-cup stack,
08:37plus the additional height contributed by the overlapping parts of the three more cups on top.
08:43By examining the difference,
08:45James realized that the height of the overlapping parts of the cups amounted to 2 inches.
08:51With this information,
08:52he figured out that the remaining height for a single cup was 5.5 inches.
08:58Eureka!
08:59His persistence paid off,
09:00and James cracked the riddle.
09:02You might say,
09:03his cup runneth over,
09:05but that's too obvious a pun.
09:07But I'll say it anyways.
09:10Take a look at these three teachers in the school canteen.
09:14One of them is a vampire.
09:16Can you guess who it is?
09:27Check out carefully what they eat.
09:29The third lady has some garlic,
09:31so she can't be a vampire.
09:34The second lady has taken a bite of food from her tray,
09:37so it's most likely hers.
09:39But the first guy's food is still untouched,
09:42so he must be just bringing it to someone else.
09:46Vampires don't really need food.
09:48They feed on blood,
09:49so that salad is of no interest to him.
09:54The Smiths family,
09:56Ginger, Ross, and their kids,
09:57Polly and Bob,
09:58had a celebration and exchanged gifts.
10:01But somehow,
10:02all the cards got lost.
10:04And since all the gifts were packed in boxes of the same size,
10:08the only thing that differs is color.
10:10Can you figure out to whom each gift belongs?
10:23Ginger,
10:24the mother,
10:25must get the gifts in green wrapping paper,
10:27because her name starts with a G.
10:30Ross,
10:31the father,
10:31gets the gifts wrapped in red paper.
10:34Polly,
10:35the daughter,
10:35gets all the pink ones.
10:37And Bob,
10:38the son,
10:39has all the blue gifts,
10:40following the same logic.
10:43On a winter day,
10:45Mike went skiing.
10:46Suddenly,
10:47he found a secret laboratory hidden in the mountains.
10:50It was well guarded,
10:51but curious Mike managed to find an open door.
10:55Once he got inside,
10:57the door got instantly shut and wouldn't open again.
11:00There in the lab,
11:02Mike saw three large barrels,
11:04each with different stuff inside.
11:06The first barrel was literally on fire.
11:09The second one was full of acid,
11:11and there was a working electric saw in the third one.
11:15All of a sudden,
11:16Mike heard a voice.
11:18Each of the barrels contains a key that can set you free,
11:22but you aren't allowed to move the barrels.
11:25Good luck!
11:26What did Mike do to escape?
11:38Hey,
11:39it seems like this lab wasn't well heated.
11:41There were a bunch of icicles on the ceiling,
11:44so he grabbed them and threw them into the burning barrel.
11:48They melted and extinguished the fire,
11:51allowing him to grab the key.
11:56Lame Horse is the most popular club in town,
11:59and lots of people hope to get inside.
12:01However,
12:02security guards are pretty strict,
12:04and all visitors must comply with the set of requirements
12:08issued by the club management.
12:10Visitors must be over 25.
12:13They must wear a total black look,
12:15and their name cannot start with an A.
12:19Now,
12:19look at these three people waiting at the entrance,
12:22who cannot be let in.
12:34Well,
12:35look at their IDs closely.
12:37We have Ivory,
12:38who's 27.
12:39She's also dressed according to the rules.
12:42Now,
12:43here's James.
12:44He's 24,
12:45and he's wearing a red t-shirt.
12:47Out!
12:48The last person is Dylan.
12:50He's got a total black look,
12:52and it seems like he's 30.
12:54But his ID is surely fake.
12:57How can someone be born on February 31st?
13:01So,
13:02only Ivory can enter the club.
13:07Josh wanted to surprise his girlfriend and buy her a present of her dreams.
13:12But he wanted to make it a surprise,
13:14so he couldn't ask her what exactly she wanted.
13:18He decided to check out her favorites on a website she always used for online shopping.
13:23But her laptop asked for a password.
13:26Still,
13:27Josh managed to unlock it.
13:29How did he do it?
13:39Look at the sticker on the desk.
13:41It looks like a bunch of misspelled words.
13:44But each typo actually helps figure out the password.
13:49O in laundry,
13:51extra I in table,
13:53extra I in mice,
13:55V in the word answer,
13:57and extra E in the word cat.
14:00Altogether,
14:01it's olive.
14:05Chastity,
14:06Chris,
14:06and Jacob
14:06are at the counter near an airport gate.
14:09All of them claim
14:10they must be on the flight to Houston.
14:13But the airline employee says
14:15there's only one seat left.
14:17The computer has frozen,
14:19and he can't check the list of passengers
14:21to verify their claims.
14:23So he can only check their boarding passes
14:26and try to understand
14:27which one is real.
14:29Can you help him?
14:39The only real boarding pass
14:41belongs to Chastity.
14:43Look,
14:44the one that Chris has
14:45mentions his date of birth,
14:47which is never printed on boarding passes.
14:50The one that Jacob has
14:52doesn't have the flight number,
14:54which is almost impossible.
14:56Well,
14:56welcome aboard,
14:57Chastity.
15:00Liam was traveling on a train
15:02where he met Brian.
15:03Now,
15:04Brian invited him
15:05to have coffee in the dining car,
15:07and Liam agreed.
15:08For some reason,
15:10Liam left the train
15:11in terror
15:11at the next station
15:12without taking his belongings,
15:14even though
15:15it wasn't his destination.
15:17Why?
15:28The thing is,
15:29on the way to the dining car,
15:31Liam spotted something
15:32he couldn't see
15:33while seated.
15:34There was a huge tail
15:36visible underneath
15:37Brian's coat.
15:39He couldn't be a human,
15:40and having coffee with him
15:41could cost Liam his life.
15:43Eww.
15:46Ashley decided
15:47to change her hairstyle
15:48and headed
15:49to the nearest hair salon.
15:50There were three hairdressers
15:52available.
15:53Which one is safe?
16:04Look,
16:05the first hairdresser
16:06has just finished
16:07working with the previous client,
16:09and the client
16:10is literally crying.
16:11The hairstyle
16:12is horrendous.
16:14The second hairdresser
16:15has knives
16:16instead of special scissors.
16:18She doesn't seem
16:18to be safe either.
16:20However,
16:21the third hairdresser
16:22seems completely fine.
16:24So,
16:25Ashley should pick her.
16:29Mary is a beginner gardener.
16:31She decided
16:32to grow some flowers
16:33in her garden,
16:34and there are already
16:35several sprouts.
16:37Yesterday,
16:37she watered them as usual,
16:39but today,
16:40she sees that
16:41all of her sprouts
16:42have perished.
16:43Why?
16:54Mary should have checked
16:55the weather forecast.
16:57Yesterday,
16:57the sky was covered
16:58with gray clouds.
17:00It was going to rain.
17:01So,
17:02the flowers
17:03got a double portion
17:04of water,
17:04which is bad too.
17:06Mary should have
17:07covered her plants instead.
17:10It was Jenny's
17:12first month
17:12at her new school.
17:14At the end of the month,
17:15she found a note
17:16from Barry
17:17in her locker.
17:18At first,
17:19she didn't get
17:19its meaning.
17:20But when she figured out
17:22that it was encrypted,
17:23the meaning
17:24became clear to her.
17:26Take a look at the note.
17:27Can you figure out
17:28what Barry wrote
17:29to Jenny?
17:39To decipher the note,
17:41you need to understand
17:42that the numbers
17:43correspond to the placement
17:44of the letters
17:45in the note.
17:46The first letter is I,
17:48the second is L,
17:50and the eighth is K.
17:52Now,
17:53keep doing this
17:54until you decipher
17:55the whole thing.
17:56The note says,
17:57I like you.
17:59It looks like
18:00Jenny has an admirer.
18:04Martha is standing
18:06on one side of a river,
18:07and her cat
18:08is on the other.
18:09Martha is calling her cat,
18:11but you know,
18:12those guys aren't
18:13into water
18:14and swimming in general.
18:15However,
18:16the cat immediately
18:17starts crossing the river
18:19without getting wet.
18:20There are no boats
18:21or bridges.
18:22How is it possible?
18:33The river is frozen,
18:35so the cat
18:36can just walk
18:37on the ice.
18:40In 1890,
18:42Bart was 15 years old.
18:44Strangely,
18:45in 1895,
18:46he was 10 years old.
18:48How is that possible?
19:00The thing is,
19:01Bart was born
19:02in 1905 BCE.
19:05The calendar
19:06worked the other way
19:07around back then.
19:09Linda and Porter
19:10were walking
19:11in the woods
19:11when they saw
19:12an old hut.
19:14They walked inside,
19:15but the door
19:16through which they entered
19:17suddenly vanished
19:19into thin air.
19:20Instead,
19:21three new doors
19:22appeared in front of them.
19:24Behind the first one,
19:25there were venomous rats.
19:27Behind the second door,
19:29arrows with poison
19:30on their tips
19:31were flying across
19:32the room at head height.
19:34And the third door
19:35hit a 30-foot-deep pit.
19:37Which door
19:38leads to freedom?
19:49They should choose
19:51the second door.
19:52They don't need to walk.
19:53They can simply
19:54crawl under the arrows.
19:57Pamela met a stranger
19:59yesterday,
20:00and she immediately
20:01knew who he was.
20:03She hadn't seen
20:04this person before,
20:05and no one had ever
20:06described him to Pamela.
20:08This person wasn't
20:09a celebrity,
20:10and he wasn't
20:11doing anything unusual.
20:12How come she knew
20:14who he was?
20:24The man was
20:26Pamela's friend's
20:27twin brother.
20:29Anna went grocery shopping
20:31and bought a lot of products
20:32that needed to be stored
20:34in the fridge,
20:34like meat and cheese.
20:36When she returned home,
20:38she realized that her fridge
20:39was already full,
20:41and she had nowhere
20:42to store all those products.
20:44What should she do?
20:55Anna needs to reconsider
20:57the way she stores stuff
20:58in her fridge.
20:59For example,
21:00rice and cookies
21:01don't need to be kept there.
21:03Once she takes
21:04all the unnecessary stuff
21:06out of the fridge,
21:07she'll have enough space
21:08to store the dairy products
21:10and meat.
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