You are the cargo director on the maiden

voyage of the S.S. Buoyant, and you’ve agreed to transport

several tanks containing the last specimens of a critically

endangered fish species to their new aquarium. Unfortunately, as you’re passing

through shark-infested waters, the boat is battered by a fierce storm,

throwing your precious cargo overboard. And to make matters worse, no one seems certain

just how many fish tanks are missing. Fortunately, you have a rescue sub

at your disposal, but only enough fuel for one trip

to the ocean floor. You need to know where the tanks are so you can gather them all

in one quick pass. Not a single fish can be lost. You decide to scan the three sectors

of the ocean floor where the cargo could have landed. Thermal imaging shows 50 organisms

in the area, and you quickly realize that that number

includes both your fish and some ravenous sharks. You flip on the sonar

to get a better look. The image for Sector Alpha shows

four tanks and two sharks, the image for Sector Beta shows

two tanks and four sharks, and the image for Sector Gamma

is blank. Your sonar has malfunctioned, and you’re going to have to go

with the info you have. You check the shipping notes, but all you learn is that each tank

had the same number of fish inside. The cargo hold had space for anywhere

from 1 to 13 total tanks. And finally, the old captain tells you

that this area has the odd property that no two sectors can have the same

number of sharks, but every sector will have at least one, and no more than seven. There’s no time to waste. The tanks won’t withstand the pressure

much longer. As you descend in the sub,

you review everything you know. How many fish tanks do you need

to find in Sector Gamma? Hurry, the fate of an entire species

depends on you. Pause here if you want

to figure it out for yourself. Answer in: 3 Answer in: 2 Answer in: 1 At first, it seems like there are just

too many missing pieces of information. After all, you don’t know how many fish

or how many tanks there are, let alone how many fish are in each one. But then you remember the best way to compare multiple pieces

of partial information – a table. Since we know there are thirteen

tanks at most, and we already see six tanks

in Sectors Alpha and Beta, we know the total number of tanks

must be between 6 and 13. We also know that each sector has

a different amount of sharks with no more than seven in each one. Since there are two in Sector Alpha

and four in Sector Beta, Sector Gamma can have

1, 3, 5, 6, or 7 sharks. What about the number of endangered fish? Out of the 50 total organisms

in all three sectors, we know at least seven are sharks, leaving a maximum of 43 fish

inside all the tanks. And the more sharks we find in Sector 3,

the fewer fish there are to save. Now, remember that the fish are

equally distributed across all the tanks. Why is that important? Because it means that one of the possible

values for the total amount of fish must be divisible by one of the possible

values for the total amount of tanks. And looking at the table, we can see

that the only combination that works is 39 fish divided between 13 tanks

with three fish in each. With sharks swarming around, you quickly pilot the sub through

the first two sectors before retrieving the remaining

seven tanks in Sector Gamma. You’ve saved the species

and taken an impromptu dive. All in all, not a bad day,

unless you happen to be a hungry shark.

Guys i solved it on my own… My first…. But i used a different method… it's algebraic

.

.

Let total no of fishes in each aquarium be f…

Than 2+4f+4+2f+x+yf= 50

where x and y r the no of sharks and no of tanks respectively

.

(6+y)f=44-x

f=44-x/6+y

Now f can't be a fraction,it can only be a whole no

And

x+6≤7 and x can't be 2and 4, only possible values r 1,3,5 and 6

Subtracting by 1 and 3 gives us a prime no so impossible and by 6 gives us 38 as numerator which has to be divided by 6+y so y should be equal to 13 which is not possible.. leaving us only with 5

Substituting this value we can get

.

.

44-5/6+7=3

Hence no of fish in each tank = 3 and total tanks in sector gamma is 7 and shark=5

.

Ps:- I couldn't resist myself sharing my solution and it's also the first comment i wrote… hope it doesn't goes unnoticed.

Everyone in the comment section has got the answer. Now I regret not pausing the video to try it myself.

I know this is really cringe but I can’t help but say this is my 2nd solved puzzle

NO WAY I GOT IT. I used algebra. I put the tanks in gamma to the max of being 7 tanks(13-2-4=7). Then made 39 divisible by 13. This is a confusing explanation but I still got 3 fish in each tanks, being 39 tanks. ALRIGHT

So your telling me there’s no other fish in the shark area? Those sharks are screwed!

Rides submarineWrites down table whilst driving submarineDies of submarine crashI hate when this happens

Why can't I just catch sharks?

Lmao~~~~~~~~~~~

Wait, can I get a promotion if I found all the missing tanks?

First one I solved on my own.😅

Or… Not go through shark infested waters in the first place???

Did this happen in the bermuda triangle? Just asking…

YES I FINALLY GOT ONE. too bad they made it look so much easier

Who in their right mind would actually set sail knowing fully well what is coming ahead? 😂

You: hit storm

Rare fish: lost

Sharks: In water

Cargo: In sea

Escape ship: you in

Actually ship: sunken

Fuel: only 1 tank

Radar: gone bad

Submarine: to get fish tanks

Tanks: less than 13

Sharks: less than 7 in each area

Sharks and fish: 50

Hotel: Trivago DUH

guess it wasnt that buoyant

I don't freaking understand anything, the logic was just too deep for my brain

What? There was said that in each tank there is equal number of fish… At the end it is 3 fish in each tank? 3 is not equal!

So happy I could solve it!

You wouldve known how many tanks you had initially, you could have counted how many tanks were left on deck after the big wave, then you would automatically know.

i just copied the chart down to look at in class im a guenius

If it was up to me, all those fishes would be sleeping with the fishes… Wait a minute…

You can make it so that there four sharks and 0 fish in the final scan which still makes it come up with fifty

I wish i had the intelligence to solve these riddlers.

So, are these the rare fish from Einstein’s Riddle?

If there is no life in the water other than the sharks, then how do the sharks survive lol

first riddle i could solve without seeing the answer

The first one that I got correct , after some 10-15 incorrect

It's answere will also be 9 boxes with five fishes in each please calculate it ,I know am right

From 0:29 wtf the ship ded

You didn't finish your final sentence.

"Unless you happen to be a hungry shark,looking for an exotic meal."

the real question is: Why did u put the tanks on the top

My maths sir sent us a list of TED talks to decide on our project topic. I just saw the word ' fish' and decided to take this without watching the video. But now I can't understand the sum properly. And Maths is my least fav subject.😩

Solved this one. It really isn't a riddle. It's just direct math

je remercie les traducteurs qui ont traduit en français

Got it 🙂

He went to all three sectors and retrieved all the boxes, didn't need all the math.

I solved this one. It felt good.

Why is that shark eating a shoe

Anyone else hate the music and voice in these videos?

Why give the sectors such weird names

I ACTUALLY SOLVED IT!!!!

I guessed 6 my thought process was correct but somewhere i must have lost my thought 🤔

1:56 It looks like he's pointing the middle finger…

Finally. My first time i answered right on this channel

“Your sonar malfunctioned”

Me: Yah, more like exploded

Oh well . Welp too bad so sad

This is the first riddle i ever solved!

Im now a genius even tho i never solved the others

And i didnt need a table

There are 10 Fish in a tank, out of which 2 have drown, 4 have swim away and 3 have died.

How many are left?

https://youtu.be/CRioezZyRK8

BOUYANT gonna find those Fish on time.

y wouldn't 38 fish between 9 tanks work? Then you have 6 sharks in sector gamma and 4 fish in each tank

Lol i love guess and check

Bro you minused 50 from 7 but there were 6 sharks

‘All in all, not a bad day’

Wonder what ‘my’ bad day must seem like •.•

Him: you are the cargo director of the ship S.S buoyant

Me: not so buoyant now huh

2:09

Rip they dropped their army bomb.

I solved it. There are 7 tanks in gamma sector

But I though there was an even number of fish…

1:57,

The mathematician ocean: no sectors shall have same number of organisms

My answer: Why didn’t you think ahead, you imbeciles!

I solved it but it took me 5 minute 😐

Me…

Trying to solve the riddle:🤔

After I think I've figured it out:😲😏

After the first 5 seconds of the answer knowing I'm wrong:😑😒

If I were there I’d say peace and dive into the ocean

Lol I solved this, so ez

Lol I solved this, so ez

39

Me: accidentally types Barney on the sonar

Sonar:

Excuse me but how is that malfunction? 1:32

Omg I actually got this one right except I did it in my head

Bruh, i spent months on this riddle doing it manually..

You always have enough fuel for a quick trip to the ocean floor. Sinks. xD

So basically, If i had this job, the sharks win. Sorry species.

Bruh, this is not a riddle

1:30

the sonar was fine a second ago lIf I was the captain of that ship I would put the tanks below and not at the top! Seriously, who does that?

7 tanks

How do you NOT know how many tanks were on your boat??

That submarine doesn't look like it can carry all the fish……oh well.

Math riddles are extremely confusing lol

Found it ! UwU

Ted Ed: Can u solve the fish-

Me: SCREW THAT!!!

fries the fish and eats itTed Ed: YoU HavE rAre fIsH SpIeCies.

Me: Oh………

………. I feel sorry for the vegans/vegetarians……..

Hurry! The fate of an entire species rests on your shoulders

(Pauses video)

Perfect!

Hurry! The fate of an entire species rests on your shoulders(Pauses video)Perfect!

this isnt a riddle, this is a word problem

i was not able to solve this one XD. I got the virus, tenple, wizard duel, and pilgrim riddles, but not this one

So there's only 3 fishes in 1 speicies. they'll gonna extinct anyway.

I’m smrat

So proud I answered the riddle

I actually got one right wow

I really just guessed to right answer first try

왜 멸종위기종을 운반하는 중요한 배가 폭풍우가 몰아칠 가능성이 있고 상어가 출몰하는 곳으로 갔을까

왜 이 중요한 작업에서 초음파 탐지기를 못 쓰는걸까(가기전에 점검같은거 제대로 안했네)

I don’t think they are going extinct soon if there if 100’s of them

This is what we call in my school, guess and check

years after years I have attempted and failed to solve a TED-Ed riddle, but today I'm glad to say that's finally changed (ok I may have used trial and error but nOt tHe pOiNt cuz I still got the right answer heh)

All you need is a bigger boat

Fish is in the 4th house. Done.

Nailed it

I still don't understand even after the explanation. 😅😅

Biology student:Just take one male and one female fish and we can save the whole species