# 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.

## 100 thoughts to “Can you solve the fish riddle? – Steve Wyborney”

1. Wasim Akhtar says:

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.

2. Khanh Linh Hoang says:

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

3. Soup Bear says:

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

4. User Name says:

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

5. Zhedrone GD says:

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

6. Alianni Duque says:

Rides submarine
Writes down table whilst driving submarine
Dies of submarine crash

7. Swompy says:

I hate when this happens

8. Jeff Yeh says:

Why can't I just catch sharks?
Lmao~~~~~~~~~~~

9. Jeff Yeh says:

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

10. lstan mulaudzi says:

First one I solved on my own.😅

11. MelbonLovesToast RANDOM VIDEOS says:

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

12. itsManuel says:

Did this happen in the bermuda triangle? Just asking…

13. Dylan Berte says:

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

14. Lazy Crazy says:

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

15. Live, love, life says:

You: hit storm
Rare fish: lost
Sharks: In water
Cargo: In sea
Escape ship: you in
Actually ship: sunken
Fuel: only 1 tank
Submarine: to get fish tanks
Tanks: less than 13
Sharks: less than 7 in each area
Sharks and fish: 50
Hotel: Trivago DUH

16. dogeunited5077 1 says:

guess it wasnt that buoyant

17. Love Plabbashy says:

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

18. Speed F7 says:

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!

19. Thilakshi J says:

So happy I could solve it!

20. Jai Goel says:

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.

21. Chloe Martz says:

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

22. PD Zombie says:

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

23. MoonCheese says:

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

24. orinpax1 says:

I wish i had the intelligence to solve these riddlers.

25. The8BitGamer887 says:

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

27. Itikana Middya says:

first riddle i could solve without seeing the answer

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

29. Hasanpreet Singh says:

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

31. Kertis Monks says:

You didn't finish your final sentence.
"Unless you happen to be a hungry shark,looking for an exotic meal."

32. AnnoyingSet of Clarinet says:

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.😩

34. Jatin Bangar says:

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

35. VH_CULTUS says:

36. Sam Sellen says:

Got it 🙂

37. Devesh S says:

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

38. CV BC says:

I solved this one. It felt good.

39. 전혜준 says:

Why is that shark eating a shoe

40. thekeys2life says:

Anyone else hate the music and voice in these videos?

41. thekeys2life says:

Why give the sectors such weird names

I ACTUALLY SOLVED IT!!!!

43. Aàrohan YT says:

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

44. Stormfalcon 123 says:

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

45. Useless Creature says:

Finally. My first time i answered right on this channel

46. Danger Duo says:

Me: Yah, more like exploded

47. Linda Young says:

48. Master9x3r4n_ says:

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

50. Bardo Iniguez says:

BOUYANT gonna find those Fish on time.

51. Daniel Hall says:

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

52. King Tommo says:

Lol i love guess and check

53. Rocky Singh says:

Bro you minused 50 from 7 but there were 6 sharks

54. KT LoveBTS says:

‘All in all, not a bad day’
Wonder what ‘my’ bad day must seem like •.•

55. Sosogamer16 says:

Him: you are the cargo director of the ship S.S buoyant
Me: not so buoyant now huh

56. Peachy Peaches says:

2:09

Rip they dropped their army bomb.

I solved it. There are 7 tanks in gamma sector

58. Pastel Arts says:

But I though there was an even number of fish…

1:57,
The mathematician ocean: no sectors shall have same number of organisms

60. Cryolophosaurus ellioti says:

61. Cynran Fantastic says:

I solved it but it took me 5 minute 😐

62. Alecia Blessing says:

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:😑😒

63. •Sushi Chan• says:

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

64. Kenan Zhang says:

Lol I solved this, so ez

65. Kenan Zhang says:

Lol I solved this, so ez

66. Profreshinal says:

Me: accidentally types Barney on the sonar

Sonar:

67. Kaithlyn Jamaludin says:

Excuse me but how is that malfunction? 1:32

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

69. Clarissa M says:

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

70. Gao Industries says:

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

71. Having Tea With the Devil says:

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

72. Idk Hi says:

Bruh, this is not a riddle

73. Ed Does Everything says:

1:30 the sonar was fine a second ago l

74. Carl Xyruz Frias says:

If I was the captain of that ship I would put the tanks below and not at the top! Seriously, who does that?

75. Cj Cola says:

7 tanks

76. Gametron13 says:

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

77. Zack Tan says:

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

78. Carrie Wong says:

Math riddles are extremely confusing lol

79. ᴘᴜʀᴇ ɪᴍᴀɢɪɴᴀᴛɪᴏɴ says:

Found it ! UwU

80. Grace Sun says:

Ted Ed: Can u solve the fish-

Me: SCREW THAT!!! fries the fish and eats it

Ted Ed: YoU HavE rAre fIsH SpIeCies.

Me: Oh………

81. Chevalier Macabre says:

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

82. Kaylee Shen says:

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

83. Kaylee Shen says:

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

84. coffeehen says:

this isnt a riddle, this is a word problem

85. Jacob Riley says:

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

86. 쵸몬도 says:

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

87. josh palmer says:

I’m smrat

88. Renz Marty says:

So proud I answered the riddle

89. Simão Figueiredo says:

I actually got one right wow

90. Austin Holden says:

I really just guessed to right answer first try

91. 노란딱지 says:

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)

92. rohan oniell says:

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

93. Aji Watcharich says:

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

94. Joy Shi says:

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)

95. Espeon says:

All you need is a bigger boat

96. Hardcore MatC says:

Fish is in the 4th house. Done.

97. wwzach16 says:

Nailed it

98. Ankit Ghosh says:

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

99. Py-Guru-JEE says:

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