# Can you solve the fish riddle? – Steve Wyborney

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.

they should say at the start that its not "try to solve it in your head" riddle, i was having a really hard time with all those details

Would any of that really have mattered. You can get to all of the sectors, and you know where the fish are in sectors 1 and 2, start there. Just dive and collect then go to sector 3 and try to collect as many as possible knowing there could only have been as many as 13 tanks. Realistically you would just have to be as quick as possible for all the sectors. Basically I'm saying knowing this didnt increase the chances of collecting all the fish it just told you exactly how many you are looking for that you feel bad if you were too slow of a sub pilot. And if you were fast enough you would have been fine anyway.

Actually did this kne

Lol I would just use the sonar on the sub

It throws your fish overboard but not all the other cargo on the ship. Sounds legit.

I know the answer.

GET MORE FRICKEN FULE

Wait, how does knowing the amount help? The amount of fish in the tank doesn’t help find them. I mean, once you gathered as many tanks as you could find, knowing the limit is 13, that should be it. What, is the passcode for the fish-finder the amount of fish in the tanks combined?

no

*OK, let's say it properly, we, the cargo director, would be screwed.

the sharks: omg look at all these fish, we finally dont have to starve, all we have to do is wait for the containers to break

some random dude: hippity hoppity these fish are now my property

the poor shark family that doesn't have enough money to buy food:

starve to deathI love the fact that there is some logical math to this riddle

This one is easy

Why am I always put in situations like this

Just go rescue the fish in the first two sectors and then go to sector gamma and just rescue whatever’s there

After 14 riddles, I finally solved this one.

*tanks of endangered fish species got threw to the ocean

CAPTAIN: wait, i'll solve a math problem

I am so fired.

I got it right!

I love how you always the important one in these videos

Who else was able to do this in there head?

finally, one that I could solve by myself

Thermal imaging scans of the sea? Fail

first ted-ed riddle that i figured out! im so proud of myself. even pulled out excel to solve it haha

first ted-ed riddle that i figured out! im so proud of myself. even pulled out excel to solve it haha

My thoughts before watching the answer:

I believe sector gamma contains 7 tanks and 5 sharks based on this formula:

6x+7x+y=44

X=3 (Meaning each tank contains 3 fish)

6 +7 equals 13 which is the maximum number of thanks. If we multiply these numbers with 3 (fish per tank) we get:

18 + 21 = 39

18 + 21 + y = 44

y = 44 – 39

y = 5 (Number of sharks in sector Gamma)

In that case there is a total of fish tanks are 13 and the number of sharks aren't equal to the two previous sectors while it remains a number beetween 1 and 7.

Full solution:

6x + 6 + xx + y = 50

6x + xx + y = 50-6

6x + 7x + y = 44

_______________Hypothesis: X=3

18 + 21 + y = 44

y = 44 – 39

y = 5

I may be wrong but I'll leave this attempt here no matter the solution. Let's see the answer.

I did this! This is the easiest one

I figured this one out! I'm so happy!

Who’s idea was it to go through shark infested waters AND not know there’s a storm coming WHILE having endangered fish?

All These ted-ed riddles are not really riddles, these are just math problems…

because thermal imaging on fish is a thing

Gamma has 5 sharks and 7 fish tanks (each with 3 fish each in them). The quick way to do it is to make a formula from a tree with speculative possible values and make logical guesses. 50 entity, fish tank is in an interval of 1 to 13 and the last tank has either +1,+3,+5,+6,+7 sharks to account while trying different factors for the number of fish in a tank. Not a native speaker and this may be unclear or too complicated for this but I solved it while typing this… lol

Answer=thanos snaps

I actually got this one by myself I feel like a genius now

Solved it

Sooooo sector Gama has 5 shark and 7 tank so a total of 12 thing in it where alpha and beta have 6 each?

There can’t be 7 tanks of fish because there has to be at least one shark there too, right?

I literally completed this one

Did I miss something but 41 is devideble by both 7 and 6.

That's a lot of maths

This is the only ted ed Riddle I’ve solved

Ted-ed:Hey, You have to save an entire species of fish and not a single one can be lost. But you know… NO PRESSURE.

This was the only Ted Ed riddle that I ever solved right

3:15 sis u said it was 2 tanks in sector alpha I see 4 de fuk

got the same answer a completely different way and now I'm just lost

Mathematical storie problems from middle school or riddles you decide

Finally solved one lmao

It took me around 20 minutes to solve the riddle but I did it

This one is just the most unrealistic scenario of the whole series with all the exceptions asumptions.

This one was actually the most easiest from Ted I tried to solve, finally one I could solve with ease hh 😅😀

I actually got this one !!! Yay

This one was pretty simple, actually. I got it in like two minutes but thought that couldn't be it because of how simply solved it was and then went on to complicate things for like ten more minutes before I finally said went with my answer and checked to see if I was right. I was! Yay!

Finally solved one 😁

you’re looking for 7 tanks in gamma, with 13 tanks total, 3 per fish

i’ll check my answer once i finish the video

The riddle looks like a typical day at work for me. And I still have no answers here or there. Anyway…

this is not a riddle

All who got it correct should get 200 out of 100. One for guessing the question and another for answer.

By 2:07 I’m like “just this story is too damn complicated”

Easy one

Anyone else notice that at the beginning of the video he said that we agreed to take seven fish tanks on the trip and later on he said there was 13 total fish tanks that fell.

I actually got one of these right omg

J

can you sort it

Omg i actually figured it out!

I actually managed to solve it myself! But I didn't make a table, I just did it by trial and error to see how many fish would make sense- from 44, to 43, 42, 41, 40 and finally 39 on the sixth guess (divided by 3 of course).

S H A R K I N F E S T E D W A T E R SI solved the riddle

With math

I somehow miraculously solved the riddle XD

People of the Ted Ed Riddle community "How many riddles have you solved without help?"

Such a victory when I solve one! But then I see how you’re “supposed” to solve it and I just get a headache lol

According to YouTube comments on another video, I am an hungry shark and this results displease me

Just fly.

Around it.

I finally got the answer

I feel so proud! I finally solved this! With the power of algebra, millions of trial and error and eternity upon eternity.

Just… get one crate and then breed them

Hmmmm very "fishy" XD

There r 50 fish but 6 box what?

50:6=8 (2 left) ok dis r so wej

YES!!! I SOLVED IT!

Plot Twist: A shark somehow hid inside a crate and the fish die

LEVITATION?!!!!!

This is the second Ted ed riddle I could solve yayy

But you went through all of them anyway?

1:31

that doesn’t look like a malfunctionCan we talk about why the sharks have two eyes and a unibrow on one side of their faces.

I did it i finally solved 1 puzzle men finally even if i didnt use a table i did it

This was legit the first Ted Ed riddle I solved myself first!!!!!

OMG I SOLVED IT

I thought the answer was 4 sharks and 2 tanks because I thought each tank contained 5 🐠:

Sector Alpha- 2 sharks and 4 tanks(4×5=20 🐠)

Sector Beta- 4 sharks and 2 tanks (2×5= 10 🐠)

[now there are 36 creatures because: 20 🐠 +10 🐠 +6 🦈 =36]

So Sector Gamma- 4 sharks and 2 tanks.

That way —> 36 creatures in the first and second sectors + 14 (2 tanks x5= 10 🐠+4 🦈 =14)=50 creatures.

:/

My personal riddle:

What should i use to video games on?

Oh i know!

2:49

That was easy

If the fish are critically endangered than shouldn't some be put in safer places? Why transfer all of them to a aquarium?

"You have just enough fuel to make one trip to the ocean floor"

Oh well. Should have refueled, huh?

Just…don't go into the shark infested waters

Or go by plane?

The guy said "7" at 4:16 incorrectly, as the video already showed, it was 5. Had me worried.

I SOLVED ITT WOOOOHOOOO FEELS GOOD MAN!

I did it I did it for the first time ever!!!

The first riddle I actually solved

Quite simple, but interesting

It is a very good logic puzzle.

Thank you ted-ed

I know i cant but i will still see it

This riddle tells to never become a cargo director