Can you solve the river crossing riddle? - Lisa Winer
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- čas přidán 31. 10. 2016
- View full lesson: ed.ted.com/lessons/can-you-sol...
As a wildfire rages through the grasslands, three lions and three wildebeest flee for their lives. To escape the inferno, they must cross over to the left bank of a crocodile-infested river. Can you help them figure out how to get across on the one raft available without losing any lives? Lisa Winer shows how.
Lesson by Lisa Winer, animation by Artrake Studio.
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Humans: can't solve easy riddles
Animals: know how to operate a raft and work together
who's side is logic on?
@@liamjeffrox whose*
Humans are animals.
@@spadaacca maybe you are animal, not me.
@@blabla-rg7ky I'm a small pineapple.
"All 6 cross just in time to avoid the fire."
*11 trips*
Prior of the Ori lmaooo😂
This guy deserves a medal
The solution have the lion Uber everyone across
so they burn
Eh maybe the fire isn’t that close to them.
Step one: confirm you have green eyes
Step two: ask the fire to leave
lol, from another TED-ED RIDDLE video
That’s true
Step two: Ask the lions not to eat the wildebeest
hAha i SeE yOu"re A mAn Of CulTure As WeLl
HAHAHA
I love how the animals just wave all friendly-like even as they're running for their lives from a fire
@ArchtansterPG: Well, 1st of all if the animals stay where they are, the 3 wildebeest and the 3 lions would all be burn to a crisp. Plus,the wildebeest and the lions all have 1 goal in mind: survive
If Lions and wildebeest can work together, so can crocs.
Hey...
True
LISTEN they where ecaul amount of number and lions dont attack then because they are smart enouhg not to BUT because of instincts they attack when outnumbering prey and dus they cannot be left alone
This is the frog and the scorpion in wildabeast and lions. In the end nobody wins. Once the lions were busy packing each other across the river all by themselves and everybody else was already on the safe side of the river they should have took off. Left the Lions by themselves.
@@cryolite08 shut up I'm from the neatherlands I am stil learning English spelling
@@jushoek Please don't be rude, you can just make a small apology. Sorry if I come off rude, I don't mean it.
My solution:
Throw water on the fire
Insert text here ya there was water in the river so they could use it
Insert funny also weird comment here)
[Best Name Ever] I know
Hey uncle
[Insert comment about the animals not having a bucket here]
"their unlikely a-LION-ce"
...
...
...
I'll see myself out.
i think that wildebeast
@@Amanda-rn6tw "No, Pierre, I didn't say a democracy of two was a wildebeast. I said, "unwieldy beast". Democracy isn't a wildebeast. It's... It's more of a gazelle. A gazelle with severe Attention Deficit Disorder."
- Michael from What's In The Bible?
Please see yourself out
i think that was wil*debest* joke i saw in some time
@@dhruvavikas1632 I didn't really understand, you meant: "wil(debest->the best) joke..."?
Genius Wildebeast: If I ask you whether the raft is safe, would you answer ulu?
Croc: OZO
Lion: Roarrrrrrr
And you're safely back to earth..
you watched it too?
@@nathanriptidal5335 yeap... Watched all in the series
What is this a crossover episode? xD
@@plasitz yeaapp XD atleast my comment is..
Aaaaannddd I still don't get it with that OZO ULU thing 😭
I ACTUALLY SOLVED THIS WITHOUT HELP SOMEONE GIVE ME A HIGH-FIVE
Super Shafs ME THREE!!!
Emily Berry wha psh!!✋🏻✋🏻✋🏻✋🏻✋🏻✋🏻✋🏻
YASSSSS!!!!!!
Emily Berry HIGH HIGH HIGH HIGH HIGH!
Emily Berry 🙏
Plot twist
The crocs and the animals become homies and the crocs carry them to the shore
yo homie
Creative Homies help homies:)
no
Creative
Ayyy
double plot twist the Crocs get dinner and the lions survive
My solution:
*takes on my best Lord Farquaad impression*
Me: Some of you may die, but it's a sacrifice i am willing to make.
László Kiss lmaooo😂😂
Lemme guess you are one wilder beast going alone and the lions and eat your friends while dying in the fire
*E*
@@tomwanders6022 You can actually take 2 wilder beast that way. Two in the raft, one gets eaten, lions die.
I actually took the time to solve this and got it right
My brain got 0.01% bigger today
0.01%? it'll take more than 10% better brainpower than a regular person probably
@@nathanriptidal5335 it’s not that hard if you and use pen and paper
@@nathanriptidal5335 he said got bigger, he meant that his brain got improved because of exercise for it
I just went 2 lions, 2 beest and then 1 of each
I though: that's easy! Beest, lion. Beest, lion. Beest, then lion! Done!
But I forgot about the raft not being able to move by itself
Bruh if a beast went first the other two would get dead
he means beast and a lion went together.
BEEST
(I thought it was beast)
Stinggyray he’s saying one of each animal come at a time
I let crocodiles carry the raft to other side.
There's a flash game about this. But instead of animals, they were cannibals and normal people
Priests to be exact
But why would the cannibals not eat the cannibals..?
@@trondordoesstuff they are homies
what was the name of it??
IQ Test
If the animals are so concerned with getting away from the fire, why aren't they continuing to run when they get to the other side, thus negating the need to be concerned about how many lions there are on the far side?
The fire can't cross the river.
You do have a point lol
Or you could throw the lions into the water!
"Fortunatly, there is a raft you can use to cross the river"
Unfortinatly, lions or wildabeast can't control a raft/boat
Finally I solved one of these without looking at the answer!
Me too, but only because I already knew this one :D
Same here!
vladomaimun Same for me
vladomaimun Same ! Woooot
Same!
the riddles is the only reason I subbed to these guys
boi u look like a Sameee
boi u look like a same and so true
boi u look like a so true. First series I found from these guys.
yeah same here
same
Wait. Those lions have two eyes on one side of their heads, so that must mean they have 4 eyes...?
Always has been
-all the better to see you with-
Its the peppa dilenma
@@nghiado9032 aye I just mentioned that lol
Nah, it means they're actually panther flounders.
I love how the lions wave at us while there is a fire behind them
‘Raging fire’ **stop to think**
Simple , the lions eat the wildebeest and carry them across in their stomachs. One trip .
Anon O'mus Well not necessarily, because the raft only carries two at a time.
So the the lions should eat the wilderbeasts, then eat the least helpful lion, then take that one trip across.
Andie G Flawless logic
...
cannibalism?
And by this time, they have all burned to death or been eaten.
No, they eat the wildebeest, two lions go across, and one makes the return trip for the last one. Two trips.
Solution:
Crocs become homies with Wildebeest and they carry them over, then they let the lions take the raft. Wildebeest are out of reach, no one dies!
yes lol
But that involves using tricks.
"The Good Ending"
It was nice of the lions to not run to safety once the 3 lions got across, I tried rewording this for D&D with 3 orcs and 3 hobbits but the orcs leaving the hobbits to die was the only answer the players got at that point.
The lions can't eat the wildebeests if they are stuck on the other side. You could probably assume that the wildebeests will not come back for the lions if they are all on the other side with no lion to row back the boat.
The problem is how does Animals row a boat?
you saw the animation, right
TheDelshady with their tail
TheDelshady good one
TheDelshady do*
Their tail? Why not their peni?
0:18 is it just me or the fire just froze in spot just for the animals?
Does anyone else find the little waves the animals do absolutely adorable?
plot twist: the fire made an alliance and granted them time to think of a plan and then enact it
They paused to get time to think ybout what to do now
Shouldnt the fire catch up to them by now
@@bawlerbro No, the fire was polite enough to give them thinking time
My solution: tell the crocodiles to bring the boat back 😂😂
There is an additional valid option after 9 crossings (2 lions and 3 wildebeests on the left bank, one lion on the right bank). The video proposes to send a lion back on the 10th crossing but the equally valid option is to send a wildebeest back. In both cases just take both animals to the left bank on the 11th crossing.
Wouldn't the wildebeest get outnumbered if it returns?
@@n_nagpurkar No. After 9 crossings we have 2L+3W on the left and 1L on the right. If we send a wildebeest back, we get 2L+2W on the left and 1L+1W on the right, so both sides have a balanced composition.
@@Pitazboras Oh yes!
That's possible too!!
*looks at riddle*
*has no clue*
"You can't think on an empty stomach!"
*shoves giant packet of oreos in mouth*
"LET'S DO THIS"
That's unhealthy...
shhhh i can do what i want
i live in a free country
Oreos are brain food!
alexesh55 i cant have Oreos... the cream is dairy, and im lactose intolerant
Alexesh LOLOLOLOL so funny :)
Mann I love these riddles🔥🔥🔥
Cedric Jeudy yea, they are good
Cedric Jeudy they are epic
Cedric Jeudy saaaaaame
Samee
Me also love these videos keep the work up!
The fire was staying still the whole time
Same
My solution :
🦁🦁<
🦁>
🦁🦁<
🦁>
There is now 1🦁 and 3🦓(yeah it's a zebra I know) on the bad side of the river, and 2🦁 on the good side.
🦓🦓< (Leaving one lion with the wildbeest)
🦁🦓>
Now, there is 1🦁 and 1🦓 on the good side, and 2🦁 and 2🦓 on the bad side.
🦓🦓< (Leaving the two lions alone)
Now, we can't send back a wilbeest, because it's gonna get eaten if we send it alone, and if we send two it's the same thing but in reverse.
🦁>
🦁🦁<
🦁>
🦁🦁<
We now have all six animald on the good side of the river.
Number of crossing: 11
Casualties: 0
Same here
Sorry I ant reading that
The first TED-Ed riddle I solved
Jann Chavez
He said it needs at least one lion and one wilderbeest but he had 2 lions on raft
Same!
Eeveelution Girl he said Or
same girl
Samee
I got the riddle on my own for the first time, yay! :D If you're stuck, try cutting 6 little pieces of paper, writing L and W on them and moving them around to represent the animals, it makes it way easier. A lot of work I know haha, but it worked :P
yo i should have done that
bro i did the exact same thing 😂 while i have to study i was just randomly cutting paper and solving riddles
HAHAHA sameeee
I love how the lions are just waving at the screen
Me learning trigonometry in school : Easy!
Me trying to solve this riddle : Damn this is hard!
Pretty sure there was a mini-game like this that you can play like 10 years ago on some flash games website.
yeah dude it was with humans and canibals
There was. The one I remember didn't have animals though, you had a policeman, a criminal, some adults and children. The criminal had to stay with the policeman and the children couldn't cross the river without an adult.
+lumos YES! EXACTLY!
www.learn4good.com/games/puzzle/boat.htm
i remember the farmer with a dog , sheep, and feed
This is one of those riddles that isn't really hard to solve, it's just tedious. There aren't any tricks or parts you need to think hard on, it just takes a lot of route checking and elimination. The riddle asks "What's the FASTEST way to get everyone to the other side" but once you start looking at the choices at each step of the way, you realize there's only one way that works.
We had this riddle in middle school once, though it was slightly different.
There were 3 things to keep track of.
Goats, wolves and cabbages. Each group had 2 members. You needed to take all of them across a river but your boat could only carry 3 things and because you need to be on the boat to control it, only 2 things can be on it.
Same rules as the video. If there are less cabbages then goats the goats will eat the cabbages. If there are less goats as wolves the wolves will eat the goats. It doesn't matter if the cabbages and the wolves are left together because the wolves won't eat them.
This one is waaay harder
This seems to be much easier than the river crossing riddle. You can just take both of the goats and leave them on other side then go back to take both cabbages and leave them there (now there are 2 of both goats and cabbages on one side) and then go back again to get both wolves.
If ur the buffaloes,ask the lions
That
'if I said you to eat me, will you'
Wait for Yarr or neh
Satty lol I know this joke
ozo.
Ulu
Don't feel sorry for any wildebeest. Remember Mufasa.........
Ayaan Siddiqui That was Scar not the wildebeest!
@@mars-nf9cj but still.....................
NEVER FORGET
@@mars-nf9cj yea and also they were hyenas in the movie
Nooooooooooooooooooooooo!
I remember flash games based around this concept
ikr I remember soling this when i was 10. it had some monks and animals as far as i remember
i knew it!! i've seen it somewhere!! it was the monks & cannibals game.. thanks for reminding me 😁
i remember flash games period
ShadowTBlack i do too lol.
ShadowTBlack me too lol
Completed my FIRST one of these! I'm so happy!
First time i solve a riddle here.. And that really makes me happy.. Yup..
High-five needed❤❤😘
"Now that the danger has passed, it remains to be seen how long their unlikely 'a *lion* ce' will last."
Anoushka Dhar get out XD
Anoushka Dhar it re-mane-s to be seen
First, it's an alliance. After the lions get hungry, it'll be all lions.
Anoushka Dhar I *herd* that!
Anoushka Dhar I'm crying 😂😂😂
That ending tho
Top Ten Anime Cliffhangers
oh my god this is the first ted-ed riddle I've actually solved
guess I just needed to get high first
why would the animals stay at the left bank instead of just running
Small plot hole for the riddle to actually work.
Because they're good boys.
They have to help out their homies. They made a deal. Lions might eat wildebeests, but when they give someone their word they always honor it.
Plus, they know if everyone gets across they will each have a whole wildebeest to themselves, and that beats having to share wildebeests.
Would you want to eat 1/3 of a wildebeest, or 2/3 of 2 wildebeests, when you could eat a whole one? Of course not.
Answer: animals wouldn't know how to use the raft and they all die. The end.
Ah. Yes.
Championriven exactly.
EEEDDDGDDGGGGGYUYYYYYYYYY
JK but so tru
Championriven This could be possible in the far future when these animals will at least be in the term of evolution in the level of dog's IQ. That is, IF these animals CAN evolve.
Majla Rolland yea they can lol
If a child drew a lion like that, i would have them tested.
why
TheChaosLp I guess because it looks like the lions mane is going between his face and snout. But I wouldn't call that a reason to get tested
"i dont like new ways of drawing things"
I didnt say i wouldnt get a T-shirt of it. Its beautifully derpy.
Its an art style. Its not supposed to be photo realistic.
I don't know why, but the lions pounding on the Wildebeest is so HILARIOUS!!!
Animals: can cooperate with a raft and surviving a wildfire
Me: can't even build Legos with my sister
I already solved this before this video was created. PROFESSOR LAYTON YO.
Abby Skelley same
wee woo
Abby Skelley which game!? I wanna know plllllzzzzz.
porlQ Professor Layton and The Curious Village I think. It's hard to find the game so.. I would try and find a good ROM. Lol
SAME
They couldn't swim anyway because that river looks polluted af
That seems natural. Algae and mud is very natural. Don't think pretty rivers are clean rivers.
BA HAH AHA
They can't swim because the crocodiles would eat them.
Nick Sacco phh
Nick Sacco i
Took me a while, but I actually solved this one. I ended up with the second solution, and it was easy halfway through because I realized since I'd ended up with a wildebeest and lion on both sides and on the raft, I just had to do the first half of the solution in reverse.
If it weren't for the lions darn instincts, they could do it in 9 trips😁
@@Saad100 yes
Why 9? I thought it was 5. You count trip back as one or sth
It would have been 5, one stay on the raft and paddle the rest
The ending reminds me of human history.
Sad.
yet true
zubmit sad but truueeee
how can u tell?
zubmi hi
you*
Plot twist
the crocodiles eat the raft (yes, they eat wood) and all the animals fall into the river
Or they could just pull the animals from the tiny raft under the water
throughout the entire task, I was tormented by the thought that the river is green...
Ted-ed: What's the fastest way for all six animals to get across without the lions stopping for dinner
Me: Easy, jump on the crocodiles
😂 true thats the best way
lol
@@teama439 Crossyroad
"There's just one problem..." Yeah, Lions nor wildebeest have opposable thumbs to row the boat
They're using their tails
Joshua Okparaocha bullshit
PixThePixel THEY USE THEIR TAILS YA DUMMY
PixThePixel ARE YOU BLIND
Joshua Okparaocha crocodiles will eat their tails
A better solution is for 2 wildebeest to go across on the first trip, leaving 1 wildebeest to be eaten by the lions who will then be killed by the forest fire, which will greatly increase the chances of the wildebeest genome continuing in a lion-free environment - survival of the fittest.
Steve Charters lol
Solving ted ed riddles boost your confidence level by 80%, until you watch another vsauce video
I don't know if it would take longer but I had a separate idea that I think would work. One wildebeast would stay on the raft the whole time. First it would bring one of the other wildebeasts over, then go back and bring the third. Next trip it gets a lion (note although at this point it would be outnumbered, same for the next point, it wouldn't die because: raft. And although this is kind of a weak point in my version, I think, played right, it would work.). This puts two lions on one side and two wildebeasts and a lion on the other. The next trip evens them out, so still good. And on the final trip both the last wildebeast and lion get off, so still even. I know its not as good as the real answer, and has a lower success/survival rate, but it's what I came up with.
I think this solution is actually closer to what I came up with…it’s 2AM so I completely forgot my idea. But yours sounds similar and like it could work too😂
The problem here is that, the moment it brings that first wildebeast over, there's one remaining wildebeast surrounded by three lions and he gets gobbled up.
how long their unlikely "a-LION-ces" last... I'm sorry... someone had to do it
6789943278923043275 lol true
6789943278923043275 ted-ed did it
That was beautiful, thank you.
6789943278923043275 xD what a name
i noticed it too lol
my uncle bet me 20 bucks that I couldn't do this... I did it and he never gave me my money😂
Lol cheapskate
LOL.
That profile picture and tha statement.😂😂😂😂
Without that "One Problem" everybody is solving this without really thinking
Ted-Ed riddle, darn it, you stumped me again!
Lel, poor crocodiles. They didn't get a role in this riddle :(((
Floralsasha yes they did. they prevented the Lions and wildabeast from swimming across. with out them this riddle wouldn't exist
Mini Shina true dat hwo stupid of me
I already knew the answer,,,, I've done this thing multiple times in Poptropica 😌
Tayah Hutchins ha me to
Oh the poor poor game, if only they decided not to wait a year to redo the whole game...
Tayah Hutchins SAMMEEE I REMEMBER THAT ISLAND IT TOOK ME SO LONG TO DO IT
OMG SAMEEEE
Can someone plz tell me which island that is
We just did this riddle today at camp!
Oh, really? Imagine that......
TED-Ed: All the animals crossed the river safely.
Me as a croc: Takes down the raft.
TED-Ed: Solves the riddle again.
K but the lions could also not be jerks for 10 minutes
A great tip for this solution is that the moves are symmetrical. This means that after the 6th move, you just mirror image the first 5 moves and get there without any thought whatsoever.
Me: *to lions*
GaRrY tHiS iS A sUrViVaL sItUaTiOn, hOlD iT fOr jUsT tEn mInUtEs
I translated this and posted this riddle in a type of school newspaper forum. (Ted ed wasn't so popular back then so no-one new this video, also this vid is in English so when you try to search it in my language this vid wouldn't come up). Alot of people tried to solve it, and many people made the mistake of thinking a wilderbeast will from the lions because it is on the raft. This is something that i think should be made clearer
One of the few I can actually solve without getting a paper, but I did a riddle similar to this in a professor Layton game
Michael Christian Yeah its the same one except you uave to count the turns
Selfish lions, do they want to escape or not?
do they
Danicker it’s just their instincts
Bandana Dee it was a joke btw
Just because they are lions doesn't mean they are humans too you know !
The Lions are giant Idiots. I could understand if they wanted to save their lion buddys but at crossing 3 all the lions are on the save side. You can' t tell me, they would go back to the fire, only to save some animals they can' t even eat.. :D
I feel so fulfilled to have correctly figured this out
I literally spent 30 minutes on this, which was good
by the time there finished thinking about who's going to be across the river the would already become medium rare
you mean the corn, sheep and wolf riddle?
Clarabelle Shepherd well similar but theres only two animals (three if you count the crocodiles
For me it was the cat, chicken and seed riddle.
for me it was sane humans and cannibals
Its not exactly like that because the animals on the raft count towards the side they are on, unlike that riddle where if the farmer is watching then it wont count
I thought it was the pedophiles and small children riddle...
Oh wait...
Step 1: confirm you have green eyes.
Step 2: Ask the water and the crocs to leave
My first thought was:
"It's the circle of life!!!!!!!!!"
SOLVED THIS IN PROFESSOR LAYTON
TheOneWhoPlays YES IM NOT ALONE
TheOneWhoPlays Same lmao
TheOneWhoPlays Wait, u play prof Layton! Nice! What game was it in?
I think curious village
porlQ
When all three lions are across, what's to stop them from just leaving the wildebeast behind and keep running?
then they dont have food maybe? :)
Atle Kristiansen the wilder beast would be all gone destroying the food cycle
same for the wildebeast. I thought they mentioned there shouldnt be 1 that outnumber the other? WTF? the narrator totally forgotten about it himself!
Atle Kristiansen the food would be too crispy
The wielderbeast can survive without lions, but lions are the exploiter class and depend on killing wielderbeasts to sustain themselves.
This is a classic Computer Science problem. We had to solve it with a program accepting 2 inputs. Number of Pairs of Lions/Wildebeast. And size of the Boat. 3,2 was the base problem. It had to calculate unique solutions. I did it over a weekend.
These kinds of riddles are always easy to solve.
The lions had a bad hair day.
JairajSingh Patil 😂😂
JairajSingh Patil lol
JairajSingh Patil Probably a sideffect of sixth extinction.
The bridge riddle on steroids
Basically
gobblergot
Except you have infinite time
I thought about this riddle when I was in 5th grade, and someone else in my class actually figured it out in about 5 minutes!
Narrator: explains the rules
Me: Well sacrifices must be made for the greater good.
I finally solved one of these dang things! Where's my cookie?
Jimmy Keffer Loooool
In your stomach
Check your browser's settings directory.
Jimmy Keffer 🍪
Here you go
The real riddle is how animals are able to ride and control a raft
I actually got this one omg I could cry I've watched so many of these videos
Animals : crosses 11 times
Fire : ok i will wait
There happens to be a 'random' raft :/
Yeah how good point
I think the tree falls and accidentally make a raft
Those lions are intelligent. They did not lose any of their lion friend.
yeah
Pretty sure for legged animals with hooves and paws cant use an oar aswell
Wtf happenend to the face of the lions
thx, this comment made me laugh
Maybe whoever drew them was in a Picasso phase.
User Name the mane gave the lions a half beard
This is the only Ted ed riddle I can solve.
I feel accomplished.
My dad always told me a riddle that is pretty similar to this one.
You are a farmer with a wolf, a chicken, and some corn. You need to get across a river with each item, but the boat will only allow you to take one at a time. If you leave the wolf alone with the chicken, the chicken will get eaten. If you leave the chicken alone with the corn, the corn will get eaten. What order should you take them in to keep each item?
So the trick is that once you take a thing, you don’t have to leave it on the other side. You start with the chicken, leaving the corn alone with the wolf. The next item you take doesn’t matter, you can do the corn or the wolf, but I’ll just explain it if you took the corn. You take the corn to the other side, and since you can’t leave the chicken alone with it, you take the chicken back to the first side. You then take the wolf over to the side with the corn, and then go back and get the chicken.
The idea is that you have to move the chicken around just to make sure the wolf and the corn are the only two items that ever get left alone.