If you want to practice more problem-solving for free, head to brilliant.org/TedEd/. If you want to signup for a "premium" account, hurry! The first 833 of you to visit that link will receive 20% off the annual premium subscription. Thanks to Brilliant.org for supporting this video!
i will use quantem magnetism to make the heavier side go down, leaving all coins to be in the same side, and then count the amount of coins andthen split it equally
Actually if you toss the coin the gold side should fall on the bottom, as gold is denser than silver. Do that with every coin a few times just to be sure then split them in any pattern, then you get 0 silver sides up on both sides
most of them yes. this one tho is more about understanding a simple concept. all the math was only them proving that concept, the math isnt needed to solve the puzzle
For the final riddle, you have to have an odd # of gold coins to be able to flip them to all gold. Including the #'s 1 and 3. If any of the 3 coin piles start with an odd # of silver coins, it wont be possible. This includes starting with 3 coins facing silver up and 1 coin facing silver up. This means that 4 out of the 8 3-coin piles are able to be turned to all gold solutions
@@richardl6751gss is shown as ssg and sgg is shown as ggs to denote the fact that the pairs are the same point in the riddle because of parity symmetry, for anyone who is flipping and jumping between the 8 combinations shown there. Thus confusion is avoided.
Essentially, since silver coins can only be removed in pairs (flipping one of each becomes...one of each), there needs to be an even amount of silver coins showing.
@@janjeikobu5163 no, so u basically take any number of cards, and flip any number of them over, then you blindfold yourself or something and take the exact number of the the cards you flipped over from your pile. (it could even be all of them)
this one was one of few riddles i got everything correct in. It was a dead giveaway when he said there was a surprisingly easy method of getting it right.
Actually, because pure gold used in old coins is soft, you can bite both sides of a coin and the one with a dent is the gold side, so there IS a way to determine which side is facing up. According to the riddle, that's cheating, but if you're stuck in an underground dungeon in total darkness cheating is the best option 😁.
Technically, it doesn't say you only have one chance. You could flip one coin into a new pile, then flip a second coin into the new pile, etc., and when the number of coins in the new pile is the same as the original number of silver-side-up coins, you'll win.
For the bonus riddle: If I am not incorrect, any pile with two silver coins can become all gold. If the two are adjacent you simply flip them and leave the initially gold coin alone. If they are on opposite sides of a gold coin then you flip each of them over once, the gold coin is then flipped twice since flipping coins on either side flips the middle coin and this remains gold, this leaves you with three gold coins.
This is the first puzzle I could do in the entire series. I tend to overthink problems, so when he said there is a surprising solution it was actually a huge help.
Even if that worked reliably, you now have no idea whether that coin was silver or gold to begin with, and with hundreds of coins in the pile it's not plausible to spin every single one of them.
It is 2:13am and I'm watching these on a bit of a binge. I usually try to solve them, but I haven't been until this one. I can't believe my half-awake solution was right! I was so pleased with my reasoning and was praying it was sound
Why don't you just bring one or more of the following: 1: Flashlight 2: Matchbox 3: Cellphone 4: Literally anything that can create light Edit: Wow, I make a list of things people should have while exploring and it gets more then 150 likes. Not that I'm complaining.
@@kathie6106 Not really, since you can flip any coin you want, you can still win. You can start with 21 silver side up coins and have 0 or 100 silver side up coins in each pile. Doing this in the dark is an issue though.
There is a way I have found out, but a little more difficult. Stand the coins up on its side. Since gold is more dense than silver, it’s side is more massive, assuming that the silver and gold go right down the middle of the coins in equal volumes. That means when you put the coin up on its side, it will always land gold side down and silver side up.
Algebra is used to prove what you should be able to tell intuitively. Advanced or difficult math is not actually required to solve the riddle. If you make a new pile of coins (Pile B), the original pile (Pile A) will have one less silver coin for every silver coin you took. So if 1 of the coins you take is silver, Pile A now has 19 silver, and if 3 of the coins you took were silver, Pile A now has 17. This is true no matter how many coins you take, and it's actually pretty obvious. Subtracting numbers from 20 may be a math operation, but it's not exactly a riddle. If you form Pile B from 20 coins, you're also guaranteeing that the number of gold coins in Pile B is equal to the number of silver coins in Pile A. This isn't a complicated math problem either. The number of silver coins in Pile A is 20 minus the silver coins you took, and the number of gold coins in Pile B is 20 minus the silver coins you took, because you took 20 coins and all the non-silver ones in pile B are gold. Once you determine these two numbers have to be equal, all that you need to do is flip Pile B. This makes all the previously-gold coins in Pile B silver, and you don't need to worry about any of the previously-silver ones, because the same motion turned them all gold.
Before I watch the video: Gold is heavier than silver. You put every coin on it’s side and gently spin it. Whichever side it lands on is gold. Then you just sort them.
Or biting the coin and if what ever the the top or bottom coin Is soft then it Is gold if it hard the it silver. This way I can I can divide equally with silver side up and gold side down.
That doesn't affect the silver coind (odd/even) since we dont know the original total number of coins and thus will not affect the solution XD good try
For the bonus riddle, I figure that if there's an even number of silver-side-up coins in the arrangement, then it is possible to make them all gold-side-up, whereas if there's an odd number then it's not possible. This is because each flip you make always affects exactly two coins, and adding 2 to or subtracting 2 from an odd number will always leave you with another odd number but 0 (the number of silver-side-ups you want) is an even number.
That's correct, but a better reasoning is as follows Assume the number of face up silver coins to be x At any operation, you're either 1. Adding 2 to the number of face up silver coins (flip 2 golds) 2. Subtracting 2 to the number of face up silver coind (flip 2 silvers) 3. No change (flip 1 silver 1 gold) Thus you'll always change the number of face up silver by 2, and no matter move you do, you can't change odd into even just by adding even numbers, so that proves it's impossible if the number of face up silver is not odd. Then you'll only need to prove it's possible for all odd configuration.
Answer for last riddle: The ones with 1 or 3 gold coins, since you always move 2 coins. An even number + another even number, will always be an even number, therefore, you can never make 3 gold coins, no matter what you do, you can only get 0 or 2.
Gold and silver have a distinctive sound. You can use the ping test to decide which one is silver and which one is gold. Silver will usually sound like a C and gold will usually sound like an A. This is usually the case no matter the size of the coin, unless the actual silver/gold content is super low. Even then, a 35% war nickel has a distinctive sound over a copper-nickel nickel.
@@finchfamily7268 perfect pitch does help, but you don’t need it. You can do it just fine using relative pitch if you have a sample sound and you compare it to the one in question.
For the sake of others who also don't want to Google it: it is a term in the cryptocurrency world which originated from a misspelling of the word "hold" meaning to hold on to the coins in hope that they will appreciate in value.
well the bonus riddle is simple... any pile with an odd Nimber of gold up coins can be made into an all gold pile while piles with an even number of gold up coins can't be made into all gold up since there are an odd no. of coins in each pile
Bonus riddle solution: as long as the top has 1 gold-facing coin, you can always make it into 3 gold. Never with 0 or 2. This is because of parity. If we start with 3 silver, flipping 2 will make it into 2 gold. Flipping the same coins sets us back to all silver, so if we flip 1 gold and 1 silver, we still have 2 gold coins face up. Every flip movement has the capability to either +2, -2, or +0 to the value of gold coins facing upwards (depending on which coins you flip). This means that even-facing trios will forever stay even, and same thing with the odd-facing piles. Knowing how to solve Rubik’s cubes, surprisingly, helped me to solve this, since certain puzzles, like 4x4 and square-1 have their own parity cases, since doing any turn on the cube changes the parity of all edges and corners on the cube. The solved state has 0 swaps of edges and 0 of corners, and doing a turn adds 3 swaps to corners and edges at the same time, which works similarly to this riddle, except every turn (or flip) changes the parity, rather than keeping it the same.
For the bonus puzzle, you can tell whether you can flip all the coins in a trio to gold side up if two of the coins are silver side up. Otherwise, if there are one or three coins silver side up, you can't make them all gold side up.
ZX T - Same answer here. Any pair flip will result in either -2, +0, +2 gold coins, which means that to end with an odd number of three gold coins, you need to start with an odd number configuration. If it asked you to end with an even number of gold coins then you'd have to start with an even number.
Oh, nevermind actually. I first thought "touching" the middle one would turn all three of them. Just listened the rules correctly, though, and yes, it seems it's as you said :x
For the bonus riddle, all the arrangements with a odd number of gold coins up can be made all gold and all the arrangements with an even number of gold coins facing up cannot. This is because whenever you swap, you either swap two gold and subtract the number of gold coins up the same, one gold and one silver where the number of gold coins up stays the same, or two silver where the number of gold coins goes up by two, all even differences. Since the final result must be 3, an odd number, you have to start with 3 or 1 gold coins up.
basically, you only have to separate the coins into two piles. Given that there are 20 silvers in total, if you take 7 silver coins in the pile of 20 coins, the other pile with automatically have 13 left. It just works out that if you flip all the 20 coins in your new pile, those 7 silver coins will become gold coins, and you will end up with 13 silver coins in your pile which is the same as the other pile. Of course it works out because of the two possible interations, but you don't need to understand that to understand how it works.
You take 20 gold coins and flip them all, you have 20 silver on both sides, right? Easy. But what if one of the 20 you took was silver? Now there are only 19 silver left on the original pile. But if you flip your 20 coins what do you end up with? One silver turns into gold and 19 gold turn into silver. So now you got 19 silver on both sides. Perfect!
+Jackson yolobs, actually it still would. If you somehow picked out all 20 silver coins from the original pile, the pile would have zero silvers, and after flipping your pile, it's now 20 gold zero silver. Zero = zero and you win. LIkewise, if you picked out 20 gold coins (no silvers), the original pile still has 20 silvers and after flipping your pile, you have 20 silvers. 20 = 20 and you still win. Basically, every gold coin you pick out of the original pile will be flipped silver side up and counted as a silver, against whatever silver coins you did not pick out of the original pile. (Any silver coins you picked out of the original pile will be flipped gold side up, and gold coins are not counted, only silver.)
Julia Budziejewska I couldn't either, but I like to think that by learning the solution we'll be able to generalize it to different but similar challenges. :)
Professor Politics definitly true, I watched 10 of those videos today and in the beginning it was really hard for me and I didn't get the 3 first ones, bit now I have a streak of 4 right ones ^-^
For the bonus riddle, here’s the answer: Looking at all of the patterns, I noticed that you can only get all gold facing up if there is an odd amount of gold coins facing up, regardless of their location in the pattern. It might take few extra flips, but here’s hot it’ll work. I’ll put “g” for it will work, and “s” for if it won’t g s s g s s g g I am confident in my answer Edit: This also works for any other number of coins. As long as the parity of both the gold coins and the total number of coins is the same, you can get all the coins facing gold side up
If you want to practice more problem-solving for free, head to brilliant.org/TedEd/. If you want to signup for a "premium" account, hurry! The first 833 of you to visit that link will receive 20% off the annual premium subscription. Thanks to Brilliant.org for supporting this video!
TED-Ed n
but why 833
TED-Ed I
TED-Ed is the answer 6 for the bonus riddle ???
i have a riddle for you😐you you you u u u
If my nose came out of my forehead I wouldn't be so generous either.
Garlic Prince lmao
Shalom.
Hahaha
Yes
I just noticed that 😂😂😂
this is the only riddle i have ever actually solved from ted ed. i just want to mark this moment with a comment. amen.
May your soul feel relieved
Wooooo
I congratulate you
Hey me too! Amen
Congrats!
When the torches went out, there shouldn’t have been a problem. His eyes and teeth glow in the dark
Actually, yeah
Theodore Budgen so is his eye
Theodore Budgen lol
What is he a garden dragon from how to train you dragon books
Maybe you have GREEN eyes. So you should just ask the Willard to leave do you won’t be tossed in the volcano
The real riddle is: How did I remember seeing 20 silver-up coins, when clearly I was occupied with other studd?
And some of the silver facing coins were underneath other coins
this man's eyes are like a fourth of his total height, they gotta be good
studd=stuff
1:40
Look at that smile....
It will haunt my nightmares forever.
I think it’s kinda derpy lol
Same😭😭😭
Riddle: "There is a surprisingly easy solution."
Me: OH I KNOW!
(Pulls out quantum physics manual)
Me: Now, let's see here...
i'm sure you will get it now lol
Well if the velocity of the coins is zero then the position of the coins is not defined.(assuming that you don't affect the coins while observing)
i will use quantem magnetism to make the heavier side go down, leaving all coins to be in the same side, and then count the amount of coins andthen split it equally
Nothing has anything with quantum physics
Actually if you toss the coin the gold side should fall on the bottom, as gold is denser than silver. Do that with every coin a few times just to be sure then split them in any pattern, then you get 0 silver sides up on both sides
"He's not gonna let you leave the dungeon. Because he wants to do a puzzle with you.."
.....Of course he does.
When you have infinite power and time, you get bored.
i want to play a game
**tries to like a million times but UA-cam won't let him :(**
"THIS REMINDS ME OF A PUZZLE"
"...But can I just leave?"
"NO IT'S PUZZLE TIME PEASANT"
lol i have the same name as you
I'm starting to think I'll never pause one of these
rising raisings your profile pic is trigring my OCD
Also looked like hair
I use the dark theme.😂
@@chandlerbing3723 same mate. 😁
dat potatoe
And I tried turning your potatoe into chips.
Me: ok so I'm gonna count out 20 coins and flip em' over
Me: drops the coins
Eccentric wizard: so you have chosen...death
Me: I had a good life...
"You just realised there's a surprisingly easy solution."
No I didn't.
Rohanjeet Das that just made me feel dumber 😔
ikr
Ye true
hahahah
>you counted that there are 20 silver coins
HOW?? but, don't remember the top parts??
step 1: confirm you have green eyes
step 2: ask the wizard to leave
System 32 Not Found nice
Jeboy Ajax 32 likes u guys r freakin me out
iDonTgeTiT
yarrow it’s another riddle about people with green eyes trapped on an island
yarrow r/woooosh
"He's not as generous about leaving the dungeon"
(Locks the already locked door with chains.)
Me: what are you doing?
What I learned from watching ted ed riddles:
I'd have to be a genius mathematician to easily solve everything unrealistic
most of them yes. this one tho is more about understanding a simple concept. all the math was only them proving that concept, the math isnt needed to solve the puzzle
Solved this, never had been any good in maths. I just questioned why the rules were formulated that way
true
@@liviorocco7817 yeah there’s explicit emphasis on the fact that you can flip coins, once you figure that out you’ve got more than half of the answer
Plot Twist: it wasnt made out of real gold or silver and the true treasure was knowledge
Sara Zeru Does not make sense because the wizard did not share any knowledge with the explorer, the explorer just knew the solution to the riddle.
The real treasure was the friends we made along the way
No, it was the Stygian coins.
The real treasure is the knowledge that wizards are douchebags.
headass
For the final riddle, you have to have an odd # of gold coins to be able to flip them to all gold. Including the #'s 1 and 3. If any of the 3 coin piles start with an odd # of silver coins, it wont be possible. This includes starting with 3 coins facing silver up and 1 coin facing silver up. This means that 4 out of the 8 3-coin piles are able to be turned to all gold solutions
Thank you for telling the answer
Also, only six of the seven combinations are shown. The right column contains two duplicates and the two combinations are missing, gss and sgg.
@@richardl6751gss is shown as ssg and sgg is shown as ggs to denote the fact that the pairs are the same point in the riddle because of parity symmetry, for anyone who is flipping and jumping between the 8 combinations shown there. Thus confusion is avoided.
Essentially, since silver coins can only be removed in pairs (flipping one of each becomes...one of each), there needs to be an even amount of silver coins showing.
Yes because flipping changes the (gold) - (silver) value by either +4 or -4, so its value mod 4 doesn’t change.
This riddle is much more impressive (fun to show people) if you do it with a deck of cards.
Oooh how do you do that?
The number of face up coins or cards is arbitrary
So you do it with 21 cards? Instead of 20? Right? Right? RIGHT?
@@janjeikobu5163 no, so u basically take any number of cards, and flip any number of them over, then you blindfold yourself or something and take the exact number of the the cards you flipped over from your pile. (it could even be all of them)
It happens that I watched Michael's video before this so, here's how it is done with a deck of cards : ua-cam.com/video/aqKkwTKWWUQ/v-deo.html
Finally a riddle video after a long time! Make more of these please :-)
himanshu sarin I agree I miss these riddles
Me too, once I saw this I got excited. I’ve literally watched all of them and I have just been waiting for them to post riddles
Tristin McCleaf me too
3:08
He shouldn’t be interested in gold
He should be interested in magic tricks
*yes*
"You just realized there's a surprisingly easy solution"
Of course!!
Keep watching the video
hahaha.....good one
In any Ted-Ed riddle, there is always at least 2 guaranteed treasures: how to solve the riddle, and comments like these HAHAHAHAHA!!!
Haha good one
iTs ACTuaLLy sUpRIsINgLY sIMpLE
Another riddle I can't solve :D
The Ace Of Spades Hucknall the same time and money to you are looking at the moment and I have to travel around the world of work
You are not alone.
this one was one of few riddles i got everything correct in. It was a dead giveaway when he said there was a surprisingly easy method of getting it right.
Same 😂😂😂
Just bite the coin. If the gold side is real it will be softer than the silver side and make a dent =D
TED-Ed should get an award for their loyalty to brilliant
Actually, because pure gold used in old coins is soft, you can bite both sides of a coin and the one with a dent is the gold side, so there IS a way to determine which side is facing up.
According to the riddle, that's cheating, but if you're stuck in an underground dungeon in total darkness cheating is the best option 😁.
pedro gomes
Or, since gold is denser, you can lay the coins on their sides, and the silver side will be on top
Puzzles should prize the most creative answer instead of the "right" one.
Gold is "soft". But you can just bite into it. It's called soft because It's not as dense as other metals.
James K. No the material of your teeth has a higher hardness scale than gold, which means if you bite it the gold will give
But would you REALLY want to bite a bunch of coins?
Man, imagine if this person hadn’t had the magic ability to see and count exactly 20 coins being silver side up initially
Technically, it doesn't say you only have one chance. You could flip one coin into a new pile, then flip a second coin into the new pile, etc., and when the number of coins in the new pile is the same as the original number of silver-side-up coins, you'll win.
Did this expeditioner seriously not have a flashlight on them wtf
Maybe he landed on it when he fell in that hole, breaking it.
Wizards do magic?
ZHBG 9224 Its a hypothetical!
Why no bag either
I don't know why this made me laugh so much
Just use your phone light
He has no phone
Well, it looked like he was in a forest and last time I checked there is no signal nor internet in the forest.
The year is 1985
Wimsem - Tekenen & Knutselen no phone ignaramus
Ciel Moro you don't need a signal to use your phone light lol
For the bonus riddle:
If I am not incorrect, any pile with two silver coins can become all gold. If the two are adjacent you simply flip them and leave the initially gold coin alone. If they are on opposite sides of a gold coin then you flip each of them over once, the gold coin is then flipped twice since flipping coins on either side flips the middle coin and this remains gold, this leaves you with three gold coins.
This is the first puzzle I could do in the entire series. I tend to overthink problems, so when he said there is a surprising solution it was actually a huge help.
What about the giant hole he fell through and just using that as light lol
Yeah i thought that as well, a much slower alternative to the video's solution.
We can hardly ask questions, can we?
There is no light at night :p
TheHealthyCow OMG YOU WATCH THIS TOO? #NOTICEMESENPAI!
golatificon wait until day
Bro watching these riddles high is such a mind blown moment
Although I didn't understand anything, I'll still pretend I got smarter just by watching this
Park Chanyeol
Same lmao
ikr
😂😂😂😂
Truth hahaha
Park Chanyeol lol same
I just though "ill try spinning, thats a good trick!"
i mean, gold is denser, right?
That’s not how that works
Even if that worked reliably, you now have no idea whether that coin was silver or gold to begin with, and with hundreds of coins in the pile it's not plausible to spin every single one of them.
@@SonicLoverDS Why not? It's not like you have anything better to be doing.
I thought they were just painted silver, not actually made of silver
I don’t think so?
It is 2:13am and I'm watching these on a bit of a binge. I usually try to solve them, but I haven't been until this one. I can't believe my half-awake solution was right! I was so pleased with my reasoning and was praying it was sound
lol that’s what I’m doing right now 😂
0:18
Good news: Yeees! Another riddle!
Bad news: I can’t solve it
0:35 the wizard is giving you the finger
Did that warlock just flip the bird at
me?!
sharp eyes m8
0:36
This made me lol
HEY! DON’T FLIP ME THE BIRD!
Why don't you just bring one or more of the following:
1: Flashlight
2: Matchbox
3: Cellphone
4: Literally anything that can create light
Edit: Wow, I make a list of things people should have while exploring and it gets more then 150 likes. Not that I'm complaining.
Audrey: The Girl in the Corner those don’t count, it’s cartoon logic.
@@theamazingcatwizard3654 you're a wizard kitty -Dogalf
5. The wands at the truel
*more than
6. the literally GLOWING eyes and teeth
"You just realized there's a surprisingly easy solution"
next time, bring tnt to blow the walls up
No a Hydrogen bomb is more effective
Yellow Lama no a recursive hydrogen bomb ception
Mark Sun lol he said that while i was reading ur comment!
Then just wish for the genie to let him out
CD2 exotic butter kaboom
plot twist :
the silver coins at the beginning weren't 20.They were 21
That...
O.o
Uh...
That's an odd number...
*THE GAME IS RIGGED!*
@@kathie6106 Not really, since you can flip any coin you want, you can still win. You can start with 21 silver side up coins and have 0 or 100 silver side up coins in each pile.
Doing this in the dark is an issue though.
@@KineticManiac Yeah, as long as you are able to count them beforehand though, otherwise it would be useless
@@nero9506 No you could just take one random coin and flip it over then do the same thing over and over until the door opens
@@Victoria3WorldConquerer yeah this is one of the riddles that are someone open-solved with a loose end-point
TED-ED: pause the video to figure it out yourself Me: NOPE!! no way am i figuring this out
same :)
I'll just lay down on my bed, and not solve anything. But watch the full video, and feel a sense of accomplishment.
I misunderstood the given riddle and thought both piles had to have same amount of coins :/ Still that is a very clever solution.
HORRIOR I thought the same thing
“You realize there is a simple solution” Yea, relight the torches with the embers in then
YES RIDDLES THANK YOU TED ED!
A Ta
heres a tough riddle
How many shrimps do you have to eat, before you make your skin turn pink?
ok ill stop
How about this riddle: Hit or miss? I guess they never miss, but I'm not sure.
cheerfulgoat
come on
First Name Last Name idk, wouldnt wanna try. If i eat too much i’ll get sick (Cus shrimps are pretty rich)
I have another riddle. Can I be Tracer? They're already Tracer though...
Audrey ARNOLD
Shrimp is my weakness
👀
👅💦
🍤
There is a way I have found out, but a little more difficult. Stand the coins up on its side. Since gold is more dense than silver, it’s side is more massive, assuming that the silver and gold go right down the middle of the coins in equal volumes. That means when you put the coin up on its side, it will always land gold side down and silver side up.
The thing is its not the material gold its the color gold and the same for silver
@@abhie8898 nah they'd probably use the material instead of paint based on how old they seem to be
It said in the rules that you cannot put the coins on their sides
I would appreciate a logic riddle every once in a while instead of constant math riddles
Logic they omitted because it would mess with the riddle, silver has a taste, gold doesn't.
This is a logic riddle, the only math is counting to 20 haha.
Math is just a formal notation for logic with numbers
Wow way to
Algebra is used to prove what you should be able to tell intuitively. Advanced or difficult math is not actually required to solve the riddle.
If you make a new pile of coins (Pile B), the original pile (Pile A) will have one less silver coin for every silver coin you took. So if 1 of the coins you take is silver, Pile A now has 19 silver, and if 3 of the coins you took were silver, Pile A now has 17. This is true no matter how many coins you take, and it's actually pretty obvious. Subtracting numbers from 20 may be a math operation, but it's not exactly a riddle.
If you form Pile B from 20 coins, you're also guaranteeing that the number of gold coins in Pile B is equal to the number of silver coins in Pile A. This isn't a complicated math problem either. The number of silver coins in Pile A is 20 minus the silver coins you took, and the number of gold coins in Pile B is 20 minus the silver coins you took, because you took 20 coins and all the non-silver ones in pile B are gold.
Once you determine these two numbers have to be equal, all that you need to do is flip Pile B. This makes all the previously-gold coins in Pile B silver, and you don't need to worry about any of the previously-silver ones, because the same motion turned them all gold.
Yes ! I've been waiting forever for a new riddle!
Did you solve it then?
Me looking at the bonus question: “If the number of gold coins facing up at the start is one or three, then it can be made all gold.”
My brain hurts
Lol I got the riddle
My hurts brain
GxgkchxuzsAssdfgddvcdsedgbhdsxcgdddDxzCvvczXxddssFFFXZDTFCCXCZvcxxxzzVCCDDDDFFFFUCJCJK J BIV LCLB IG *> £,>>+,,%*,%.+,
Who else thinks the detective's face is upside down?
Christine Ng
Now I cannot unsee it.
LoL... You are a real detective!!! Right?
Christine Ng what is seen cannot be unseen
My phone auto rotates huhuhu
Oh
My
God....
You have opened my eyes
The real question is:
Why are your maps crumbling?
They are very old maps
3:20 OH, HERE'S THE ALGEBRA.....
Algebra, everyone's least favorite topic:D
Finally found out why we ‘need’ it.
Before I watch the video:
Gold is heavier than silver. You put every coin on it’s side and gently spin it. Whichever side it lands on is gold. Then you just sort them.
That's a good way of doing it, and it works in theory, but not in the video's scenario.
Great scientific thinking, though!
Sounds great on paper, but it won't always work
They say in the rules that you can't put the coins on their sides.
Even so, there is still a chance that the coin will land on silver.
you already watched the video, thats how you know there were gold and silver coins involved, because it doesnt say so in the title.
0:35 when wizard does middle finger
Have you heard of the pointing finger?
Bro doesn't know what an index finger is 💀
These riddles are so much fun, please make more :)
The dark coin riddle - secretly a Bitcoin 😁
Continual Improvement not going to lie I thought this was going to be about Bitcoin 😅
lol i agree, bitcoins!!!
The like he has is my like
yeah! bitcoin!😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😄😄😄😂😄😆😆😆😆😆😆😆😆😁😆😆😁😁😁😆😁😊😀😆😁😆😁😆😁😆😆
There is a surprisingly easy solution:
Cut all the coins in half
lol ur a genius
Or biting the coin and if what ever the the top or bottom coin Is soft then it Is gold if it hard the it silver. This way I can I can divide equally with silver side up and gold side down.
1:34 When suddenly my dad enters my room at 2 am.
Gagan Bharadhwajsuchi lol
Thats disturbing that your dad would go into your room in the middle of the night
why your daddy going to your room at night ???? that's weird
Phương Nguyễn guessed right .
Your real father or your step father?
Bonus riddle: odd number of gold
...I think
That doesn't affect the silver coind (odd/even) since we dont know the original total number of coins and thus will not affect the solution XD good try
In the bonus riddle there are always 3 coins total.
Jay Wing same solution.....
You're right. If they started with an odd number of gold sided coins, then you can make them all gold sided.
For the bonus riddle, I figure that if there's an even number of silver-side-up coins in the arrangement, then it is possible to make them all gold-side-up, whereas if there's an odd number then it's not possible. This is because each flip you make always affects exactly two coins, and adding 2 to or subtracting 2 from an odd number will always leave you with another odd number but 0 (the number of silver-side-ups you want) is an even number.
That's correct, but a better reasoning is as follows
Assume the number of face up silver coins to be x
At any operation, you're either
1. Adding 2 to the number of face up silver coins (flip 2 golds)
2. Subtracting 2 to the number of face up silver coind (flip 2 silvers)
3. No change (flip 1 silver 1 gold)
Thus you'll always change the number of face up silver by 2, and no matter move you do, you can't change odd into even just by adding even numbers, so that proves it's impossible if the number of face up silver is not odd.
Then you'll only need to prove it's possible for all odd configuration.
@@t_konso the answer to the puzzle is 3?
Answer for last riddle: The ones with 1 or 3 gold coins, since you always move 2 coins. An even number + another even number, will always be an even number, therefore, you can never make 3 gold coins, no matter what you do, you can only get 0 or 2.
Last riddle is easy. Step 1 first try to make all 3 silver
I gotta say the more I actually solve these riddles by myself, the easier they become.
This solution is so elegant and obvious in hindsight- Colour me impressed!
he is ROCKING that unibrow though
Another riddle that I will try to solve but will be proved wrong
I appreciate the man's ability to think in an unthinkable situation, a complicated formula
oh yeah you can take my coins i don’t really need them anymo- HEY WHAT ARE YOU DOING YOU CAN’T LEAVE HERE
Gold and silver have a distinctive sound. You can use the ping test to decide which one is silver and which one is gold. Silver will usually sound like a C and gold will usually sound like an A. This is usually the case no matter the size of the coin, unless the actual silver/gold content is super low. Even then, a 35% war nickel has a distinctive sound over a copper-nickel nickel.
Non-perfect pitch people tho
@@finchfamily7268 perfect pitch does help, but you don’t need it. You can do it just fine using relative pitch if you have a sample sound and you compare it to the one in question.
Wizard: YOU HAVE FOUND THE GREAT TREASURE TROVE...
Adventurer: hold on one second, let me count how many of these coins are silver side up.
0:08 I like how TED-Ed uses the German Imperial Cross as the X-marks on the map
When you leave with the coins, make sure to HODL
gold is a bubble.
SDG Danny what is a HODL
DooBick Use Google, my friend. This one's worth it :)
For the sake of others who also don't want to Google it: it is a term in the cryptocurrency world which originated from a misspelling of the word "hold" meaning to hold on to the coins in hope that they will appreciate in value.
酷子梅川 it means hold on for dear life
if you scroll down enough in any of ted-ed's riddles, you'll find someone saying just confirm you have green eyes
well the bonus riddle is simple... any pile with an odd Nimber of gold up coins can be made into an all gold pile while piles with an even number of gold up coins can't be made into all gold up since there are an odd no. of coins in each pile
1:14 Oh no. My brain cannot remember that kind of detail. Nope. I'm a dead man
Bonus riddle solution: as long as the top has 1 gold-facing coin, you can always make it into 3 gold. Never with 0 or 2. This is because of parity. If we start with 3 silver, flipping 2 will make it into 2 gold. Flipping the same coins sets us back to all silver, so if we flip 1 gold and 1 silver, we still have 2 gold coins face up. Every flip movement has the capability to either +2, -2, or +0 to the value of gold coins facing upwards (depending on which coins you flip). This means that even-facing trios will forever stay even, and same thing with the odd-facing piles. Knowing how to solve Rubik’s cubes, surprisingly, helped me to solve this, since certain puzzles, like 4x4 and square-1 have their own parity cases, since doing any turn on the cube changes the parity of all edges and corners on the cube. The solved state has 0 swaps of edges and 0 of corners, and doing a turn adds 3 swaps to corners and edges at the same time, which works similarly to this riddle, except every turn (or flip) changes the parity, rather than keeping it the same.
*gets the answer wrong*
"Well I mean- my first guess was kinda close.."
"You just realized there is a surprisingly easy solution."
You overestimate my intelligence and underestimate human stupidity.
Like 😂😂No game nolife
1:43 *me when I see junk food unattended in the kitchen*
Am I the only person that thinks the guys face looks better upside down?
For the bonus puzzle, you can tell whether you can flip all the coins in a trio to gold side up if two of the coins are silver side up. Otherwise, if there are one or three coins silver side up, you can't make them all gold side up.
This is the only riddle I was able to solve, felt great for a change
Just pull out your flashlight or did you expect that the dungeon would always be lit?
Wizard: *Says The Riddle*
Me: Ok
*Lights Went Out*
Also Me: *COWERS IN FEAR CAUSE IM SCARED OF THE DARK*
I KEEP GETTING THESE NOW, MY BRAIN GREW
The end riddle is only possible if all of them are gold or one is gold.
Ethanol 314 only odd amounts of gold
Harry Or alternatively I said only even numbers of silver
1:02 gOoD thINg i BrOUghT A LiGHtEr
Every time I’m excited about these riddles I remember... these are unsolvable math problems
Is the solution to the bonus riddle that only piles with an odd number of golds can be made all gold, I might be wrong as this is a bit of a guess.
ZX T - Same answer here. Any pair flip will result in either -2, +0, +2 gold coins, which means that to end with an odd number of three gold coins, you need to start with an odd number configuration.
If it asked you to end with an even number of gold coins then you'd have to start with an even number.
Any piles can become all gold.
satrio eko wicaksonso how can you make the all silver pile into all gold? I'm pretty sure it's impossible (same applies for single silver sets).
ZX T tap left, than middle, than left again. Any arrangement can be flipped into all golds, I suppose.
Oh, nevermind actually. I first thought "touching" the middle one would turn all three of them. Just listened the rules correctly, though, and yes, it seems it's as you said :x
Ive seen a card trick like this once but still couldn’t remember the solution nice video
For the bonus riddle, all the arrangements with a odd number of gold coins up can be made all gold and all the arrangements with an even number of gold coins facing up cannot. This is because whenever you swap, you either swap two gold and subtract the number of gold coins up the same, one gold and one silver where the number of gold coins up stays the same, or two silver where the number of gold coins goes up by two, all even differences. Since the final result must be 3, an odd number, you have to start with 3 or 1 gold coins up.
Watched the answer and I'm still confused...
basically, you only have to separate the coins into two piles. Given that there are 20 silvers in total, if you take 7 silver coins in the pile of 20 coins, the other pile with automatically have 13 left. It just works out that if you flip all the 20 coins in your new pile, those 7 silver coins will become gold coins, and you will end up with 13 silver coins in your pile which is the same as the other pile. Of course it works out because of the two possible interations, but you don't need to understand that to understand how it works.
You take 20 gold coins and flip them all, you have 20 silver on both sides, right? Easy.
But what if one of the 20 you took was silver? Now there are only 19 silver left on the original pile. But if you flip your 20 coins what do you end up with? One silver turns into gold and 19 gold turn into silver.
So now you got 19 silver on both sides. Perfect!
what if he picked up all 20 silver in the new pile ? it wouldn't work
+Jackson yolobs, actually it still would. If you somehow picked out all 20 silver coins from the original pile, the pile would have zero silvers, and after flipping your pile, it's now 20 gold zero silver. Zero = zero and you win.
LIkewise, if you picked out 20 gold coins (no silvers), the original pile still has 20 silvers and after flipping your pile, you have 20 silvers. 20 = 20 and you still win.
Basically, every gold coin you pick out of the original pile will be flipped silver side up and counted as a silver, against whatever silver coins you did not pick out of the original pile. (Any silver coins you picked out of the original pile will be flipped gold side up, and gold coins are not counted, only silver.)
I love these Ted-Ed riddles!
Wow! This is the only TedEd riddle I’ve ever been able to actually solve!
I managed to get this one yesssssss
Nope, I can't solve it
Julia Budziejewska I couldn't either, but I like to think that by learning the solution we'll be able to generalize it to different but similar challenges. :)
Julia Budziejewska it’s 4
Professor Politics definitly true, I watched 10 of those videos today and in the beginning it was really hard for me and I didn't get the 3 first ones, bit now I have a streak of 4 right ones ^-^
+Julia Budziejewska, but did you at least understand the solution?
Stratelier yeah, I understood solution, thanks tho
Wizard: This will surely get hi-
Me: *Uses flashlight*
Wizard: Am I a joke to you?
Yes, I can.
*Edit:*
Actually, I once gave this riddle to someone in the comments on Ted-Ed video.
Which video?
Prove it.. 😋😋
I thought this said "dank coin" not "dark coin"
Plot twist: The coins were actually round, painted Doritos.
French Metroid MEWMEWMEW MEW MEEEEEEW
You have been watching too many memes boi
French Metroid u have seen to many memes my boi
Gimme dem dank coins
this is the most brilliant solution i have ever seen
For the bonus riddle, here’s the answer:
Looking at all of the patterns, I noticed that you can only get all gold facing up if there is an odd amount of gold coins facing up, regardless of their location in the pattern. It might take few extra flips, but here’s hot it’ll work. I’ll put “g” for it will work, and “s” for if it won’t
g s
s g
s s
g g
I am confident in my answer
Edit: This also works for any other number of coins. As long as the parity of both the gold coins and the total number of coins is the same, you can get all the coins facing gold side up
Time stamp: 4:28